Summary: The guide highlights the common reasons that result in duplication of email messages in Outlook 2016 and describes the best ways to resolve an email replication issue without affecting the smooth functionality of the mailbox.
I was just giving a demo. I just spammed E-mail ID 1 with Email 2 just to see how junk mail works. Only 1 email i spammed and then un spammed it. Not clear on what you mean by 'un spammed it'. Also not clear on what you were referring to in a previous message regarding '.its asked me to type what see in box.for some protection thing.'
Suggest you delete/rename the OST file associated with this account and let Outlook recreate it and resync the next time you connect to the account. Beyond that, will have to leave this for someone else to answer. Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. Dear Team, I Have Just recently configured my Ms-Outlook 2016 with my outlook.com Email Id and i was using since 2 weeks now suddenly while sending mail i get this msg MAIL BOX HAS REACHED MAXIMUM SIZE LIMIT.How can that be even possible I have Hardly any Mails. Did you follow the instructions shown on the message?
Can you send directly from the Outlook.com account via the web interface? If no - then this has nothing to do with OL'2016 and needs to be addressed by the Outlook.com folks. Evidently your mailbox has become full If yes - then suggest deleting the underlying.ost file for the account and let Ol'2016 recreate it. As an aside, a mailbox reaching capacity has nothing to do with 'time' - just takes a few messages with some extremely large attachments being sent to you (or you in turn doing the same to others) or otherwise depends on how much email you send/receive.
Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. How i got the error is bcoz i spammed my ID with another email address while checking the features of JUNK mail.then i got a msg saying that t login in to outlook from web.its asked me to type what see in box for some protection thing. And Then soon after that my mails when sending gave Error Msg saying mail box is fulll. BY the way From The Outlook.com web I am Able to send mails.no error from there only while using MS - Outlook 2016 Kindly let me know the steps.
How i got the error is bcoz i spammed my ID with another email address while checking the features of JUNK mail.then i got a msg saying that t login in to outlook from web.its asked me to type what see in box for some protection thing. Kindly let me know the steps Have absolutely no idea what the first part is all about - specifically 'login in to Outlook.com via web.
Asked to type what's in the box'. In terms of OL'2016 - only suggestion I have is the one already made in the previous response is to rename or delete the.ost file associated with the Outlook.com account. Once that's done - OL'2016 will recreate the file and re-sync the data. File - Account Settings - Data Files tab - will show the folder/file path of the.ost file Out of curiosity - just how much email did you 'spam' this account with? Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. I was just giving a demo. I just spammed E-mail ID 1 with Email 2 just to see how junk mail works.
Only 1 email i spammed and then un spammed it. And now i get the out of space error that i mentioned above. Via Outlook.com web my mails are going I also recreated that account on outlook client and is still get the same errorss. Maximun size reach i have just 2 mails in 'inbox' and 3 sent mails in 'Sent' all of them were just test mails.which just a single line. Let knw if there is anything possible. I was just giving a demo. I just spammed E-mail ID 1 with Email 2 just to see how junk mail works.
Only 1 email i spammed and then un spammed it. Not clear on what you mean by 'un spammed it'. Also not clear on what you were referring to in a previous message regarding '.its asked me to type what see in box.for some protection thing.'
Suggest you delete/rename the OST file associated with this account and let Outlook recreate it and resync the next time you connect to the account. Beyond that, will have to leave this for someone else to answer. Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. F9 key doesn't allow access to Outlook.??????
What exactly do you mean by '.doesn't allow access to Outlook'? A little unclear given that F9 is the 'check for new messages' shortcut which also assumes that you don't have something else running that uses the same shortcut (having Camtasia recorder is just one example. Might also want to provide some details regarding 'I can't get Outlook to remove. I have the same issue, using Outlook 2016 as part of Office 365 Home. The email account used is [email protected]. I allowed Outlook to connect automatically to the account automatically, but I am assuming it is using POP3. I'm attempting to distribute a newsletter to about 1,000 subscribers, which I was able to do fairly easily with only 250 subscribers until I converted from Windows 7 / Outlook 2010 to Windows 10 / Office 365.
After a lot of messing about and finally giving up on ever using my usual Yahoo! Account, I got small mail merges - up to 75 recipients - working well, so I ran one with 221 recipients and all heck broke loose. The 'Your mailbox has reached its maximum size limit.'
Message comes up over a hundred times every time the program tries to send. It then requires one click per occurrence in order to use Outlook. Even when I work offline, trying to free up space, the message comes up, although less frequently, and I have to click to dismiss it. From what I have gathered, it appears that this error message ACTUALLY reflects a 100-recipient-per-day rule that Outlook observes by default. In order to modify the rule, registry changes are required, but I cannot find an understandable description of how to modify the settings. Can anybody help, please?
Time is critical. #1 - The email account used is [email protected]. I allowed Outlook to connect automatically to the account automatically, but I am assuming it is using POP3.
#2 From what I have gathered, it appears that this error message ACTUALLY reflects a 100-recipient-per-day rule that Outlook observes by default. In order to modify the rule, registry changes are required, but I cannot find an understandable description of how to modify the settings. #1 - There is no need to 'guess anything' - from the OL menu - go to File - Account Settings - email accounts are listed under the and account type (protocol) is listed on the right-hand side. That said, based on our description - the email account type doesn't make a difference #2 - Restrictions in terms of # of recipients per day, # of recipients per message, # of messages allowed per hour and # of messages allowed per day are governed by the ESP (email service provider) - not anything you can change/set from within Outlook (desktop). Any deviation from any ESP's limits must be handled by the ESP.
Outlook is not intended as a 'bulk mailer' - that's what services like address for all kinds of resons (ensuring compliance with the CAN-SPAM act to name but one). Using Outlook for Email Marketing Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. #1 FYI, Following your instructions, the email Type for an outlook.com account is Exchange ActiveSync, i.e., neither POP3 nor IMAP. #2 My ISP has a limit of 300 mailings per day.
I can live with 300 per day, even with 100 per day. But this morning, I set up 100 messages and Outlook halted after the first message. I finally noticed an email from the outlook.com team advising me that I had to sign in to my Outlook.com account and prove that I was a human. I did that and four more messages finally went through. At this moment, I am looking at 95 messages ready to be sent and the useless 'Your mailbox has reached its maximum size' message comes up over and over, even when working offline. After four weeks of converting to Win 10 and Office 365 and compatible versions of my core software, I give upon Outlook.
My group is a small not-for-profit that sends out four or five mass mailings in August and September. Constant Contact, while a wonderful product that is used by larger affiliated groups, would make no sense whatsoever for us, given our shoestring budget. Next step is to check out MailChimp, according to tech support at my ISP. Next step is to check out MailChimp, according to tech support at my ISP. MailChimp is certainly another legit option you should pursue but just to clarify one thing. There is a world of difference between Outlook.com and Outlook (desktop) - part of Office 365. Any limitations encountered stem from whatever limits the email service provider enforces for it's and not from whatever you are using.
There are no limits built into Outlook (desktop). Understanding Email Accounts and Email Clients Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. Karl, I am at my wits' end with this situation. I have no problem with the account/client distinction and as I said above, my ISP has a 300-message daily limit on mass mailings. I had hoped that using all Microsoft from end to end would be very smooth and free of problems. To further explain my environment: I have used ACT!'
S mail merge with various versions of Outlook with no problem for the 15 years that I have been running my prostate cancer support group. Never a single issue. Nothing has changed over the past five years, until I converted to Windows 10 and Office 365 this Spring. I had to upgrade to V18 of ACT!, the first version that is 'guaranteed' Windows 10 compatible. At this point, I have 775 members left to contact and Outlook has stopped working altogether, even after I cleared out every last mail merge message.
There are two individual messages in the outbox, but they will not send. The maximum size message keeps popping up until I close Outlook. I'm currently attempting to Repair the outlook.com setup, but that's been going on for over 35 minutes now. MailChimp is interesting but doing what I need to do will be very difficult. The flexibility that ACT! Has always provided is sadly lacking.
#1 - Nothing has changed over the past five years, until I converted to Windows 10 and Office 365 this Spring. #2 - At this point, I have 775 members left to contact and Outlook has stopped working altogether, even after I cleared out every last mail merge message. There are two individual messages in the outbox, but they will not send. The maximum size message keeps popping up until I close Outlook. #3 - I'm currently attempting to Repair the outlook.com setup, but that's been going on for over 35 minutes now.
Beginning to wonder if there is more than just one problem at play or if the description being provided is (un-intentionally) incomplete. #1 - In terms of the 'nothing has changed over the past 5 years' - just for clarification, are you saying that you have been using the same Outlook.com account to send out your emails during this entire period? #2 - Also to clarify something - if you are sending your emails via your Outlook.com account - your ISP's (ergo your ESP - ) max has no bearing on anything since you're using Outlook.com servers for email - hence your ESP's account limits don't come into play) #3 - Not sure what you mean by '.currently attempting to repair the Outlook.com setup.going on for 35 minutes'. Anything that's taking 35 minutes, in and of itself indicates aome other issue(s) that transcends the 'Max file limit' issue. Suggest that you create a new Outlook profile and configure the email account again in the new profile making sure to set the new profile as the default for the next time Outlook opens. Also 'new profile' means creating it from scratch - not copying an existing one and making changes to it.
Just in case this info is of any use: How to create profile and set up an e-mail account in Outlook Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com. I recently bought an Office 365 subscription and also signed up for an @outlook.com email account, thinking it would be a smooth run with my new desktop Outlook and my Android phone Outlook. That was in my dreams. Last night I sent messages to 65 friends notifying them about my new email address.
During the process, I received several times messages from the “Outlook.com team’ asking me to re-verify my account due to “suspicious activity”, which I did. Today, I am unable to send emails and I get this notorious message, described above, about ‘mailbox having reached maximum size’. I have followed the steps and deleted all the 65 original messages from “sent items” both on the desktop and the website, and have also cleaned out the ‘deleted items’ folder both places, but to no avail. I can send emails from the outlook.com site, but not from my desktop. On the other hand, I can send from several other email accounts in the desktop Outlook, so this has absolutely nothing to do with my ISP. Please provide a solution to this. I have struggled with it for hours and I am beginning to regret that I chose Microsoft instead of Apple.
Today, I am unable to send emails and I get this notorious message, described above, about ‘mailbox having reached maximum size’. How large is the.ost file associated with the Outlook.com account? - From the OL menu - go to File - Account Settings - Data Files tab - Take note of the location for the OST file associated with the Outlook.com account - Go to that location using Windows Explorer to get the file size Out of curiosity - are there any messages in your Outlook.com that have one or more extremely large attachments Karl Timmermans Outlook MVP 'Outlook Contact Import/Export/Data Mgmt' http://www.contactgenie.com.
Note This article is for IT Pros and admins that are deploying and configuring Outlook 2016 for Windows for users in their enterprises. If you're a user trying to configure your Outlook settings, see. Comparison of Cached Exchange Mode and Online Mode Cached Exchange Mode gives users a seamless online and offline Outlook experience by caching the user's mailbox and the Offline Address Book (OAB) locally.
With Cached Exchange Mode, which is the default setting for users, Outlook no longer depends on continuous network connectivity for access to user information. When a user is connected, Outlook continuously updates users' mailboxes so that the mailboxes are kept up to date. If a user disconnects from the network, for example, by moving to an area without Wi-Fi access, the user can continue to access the last available email data. Important We recommend always using Cached Exchange Mode with an Office 365 account. Online Mode works by using information directly from the server, and, as the name implies, it requires a connection.
Mailbox data is only cached in memory and never written to disk. Cached Exchange Mode is the preferred configuration in Outlook 2016 and is useful in the following situations:.
Users who frequently move in and out of connectivity. Users who frequently work offline or without connectivity. Users who have high-latency connections (greater than 500 ms) to Exchange Server. Online mode is useful in the following situations:. Kiosk scenarios, where a particular computer has many users who access different Outlook accounts—and the delay to download email messages to a local cache is unacceptable.
Heavily regulated compliance or secure environments where it is a risk to store data locally. In addition, we recommend that you consider using Encrypting File System (EFS) or BitLocker as a robust solution.
Large mailboxes on computers that don’t have sufficient hard disk space for a local copy of the mailbox. Even when it is configured in Cached Exchange Mode, Outlook 2016 must contact the server directly to do certain operations. These operations won't function when Outlook is not connected and can take longer to complete on high-latency connections.
These operations include the following:. Working with Shared Folders that were not made available offline. Retrieving Free/Busy information. Setting, changing, or canceling an Out of Office message. Accessing public folders that were not made available offline. Retrieving rights to a rights-protected message.
Editing rules. Retrieving MailTips. Retrieving Policy Tips. Delayed delivery options are client side in cached mode and server side in online mode. So, when you use Cached Exchange Mode, Outlook must be connected and open at the assigned delivery time for the delayed delivery message to be sent. Outlook 2016 supports running in Cached Exchange Mode in a Remote Desktop Services (RDS), formerly known as Terminal Services, environment that has multiple users.
When you configure a computer running RDS to use Cached Exchange Mode, be sure to consider the additional storage space and disk I/O that are required for multiple client access. New Exchange accounts set up on computers running RDS use Online Mode by default.
At setup, the user can decide to enable Cached Exchange Mode. Planning considerations for Cached Exchange Mode for Outlook 2016 In some cases, you can improve the performance of Cached Exchange Mode for your whole organization or for a group of users—for example, users who work remotely. Outlook data file (.ost) recommendations When you use Cached Exchange Mode, be aware that users' local.ost files are 50 percent to 80 percent larger than the mailbox size reported in Exchange Server. The format that Outlook uses to store data locally for Cached Exchange Mode is less space-efficient than the server data file format. The maximum size for.ost files is configurable.
The default is 50 GB of data storage. Make sure that users'.ost files are located in a folder that has sufficient disk space to accommodate users' mailboxes. For more information about how to deploy.ost files to a location other than the default location, see.
For more information about how to configure.ost file size, see. Upgrading existing Cached Exchange Mode users to Outlook 2016 When upgrading, if you do not change Cached Exchange Mode settings, the same settings are kept for Outlook 2016. However, by default, when Outlook 2016 is installed and Cached Exchange Mode is enabled, a new compressed version of the Outlook data file (.ost) is created. The earlier version of the.ost file is kept and, if it is necessary, can be opened by Outlook 2016. If you must keep Outlook 2016 from creating a new compressed Outlook data file (.ost), use the Group Policy template for Outlook (Outlk16.admx) to enable the Do not create new OST file on upgrade policy setting. For more information about how to configure this and other settings, see. Note The Exchange Fast Access feature that was added to Outlook 2013 Exchange Cached Mode has been deprecated in Outlook 2016.
Managing performance issues in Outlook Most users find that Cached Exchange Mode performs faster than online mode. However, several factors can influence a user's perception of Cached Exchange Mode performance, like hard disk size and speed, CPU speed,.ost file size, and the expected level of performance. For troubleshooting tips about diagnosing and addressing performance issues in Outlook, see. Managing Outlook folder sharing By default, when Cached Exchange Mode is enabled, shared mail and nonmail folders that users access in other mailboxes are downloaded and cached in the user's local.ost file.
Similarly, if a manager delegates access to his or her Inbox to a team member, when the team member accesses the folder, Outlook 2016 also starts caching the Inbox folder locally. You can disable caching of all shared folders for profiles that have Cached Exchange Mode enabled. To do this, configure the Download shared non-mail folders option in the Office Customization Tool (OCT) when you customize your Cached Exchange Mode deployment. Note that this setting applies to both mail and nonmail folders in Outlook 2016.
If you want to disable caching of shared mail folders (like a delegated Inbox) but not shared nonmail folders (like Calendar), see. For more information about how to configure these settings, see. Site mailboxes As an alternative to Public Folders, consider Site Mailboxes.
Site mailboxes improve collaboration and user productivity by allowing access to both SharePoint Server documents and Exchange email that are in the same client interface. A site mailbox consists of SharePoint Server site membership (owners and members), shared storage through an Exchange Server mailbox for email messages and a SharePoint Server site for documents, and a management interface that addresses provisioning and life-cycle needs. SharePoint Server documents that are viewed in the site mailbox are stored only on SharePoint Server. For more information, see. Managing Outlook behavior for slow connections Outlook is configured to determine a user's connection speed by checking the network adapter speed on the user's computer (supplied by the operating system). If the reported network adapter speed is 128 KB or lower, the connection is defined as a slow connection. When a slow connection to an Exchange Server computer is detected, Outlook helps users have a better experience if they reduce the less important information that is synchronized with the Exchange Server computer.
Outlook makes the following changes to synchronization behavior for slow connections:. Switches to downloading only headers. Does not download the Offline Address Book or OAB updates. Downloads the body of an item and associated attachments only when it is requested by the user. Outlook continues to synchronize the Outlook data with mobile devices, and some client-side rules might run.
Note We recommend that you do not synchronize mobile devices when the Cached Exchange Download only headers setting is enabled. When you synchronize a mobile device by using ActiveSync, for example, full items are downloaded in Outlook, and the synchronization process is less efficient than it is during regular Outlook synchronization to users' computers. The Download only headers setting for synchronization is designed for Outlook users who have dial-up connections or cellular wireless connections, to minimize network traffic when there is a slow or expensive connection. For a scenario where users' actual data throughput is slow, even though their network adapters report a fast connection, you can disable automatic switching to downloading only headers by using the Group Policy option, Disallow On Slow Connections Only Download Headers. Similarly, there might be connections that Outlook has determined are slow but which provide high data throughput to users. In this case, you can also disable automatic switching to downloading only headers. You can configure the On slow connections, download only headers option in the Office Customization Tool (OCT), or configure the option by using Group Policy to set Disallow On Slow Connections Only Download Headers.
For more information about how to configure these settings, see. Configure Cached Exchange Mode for Outlook 2016 Offline data file (.ost file) and Offline Address Book (OAB) When an Outlook 2016 account is configured to use Cached Exchange Mode, there's always a local copy of a user's Exchange mailbox ready in an offline data file (.ost file) on the user's computer. By default, the.ost file is in the C: Users AppData Local Microsoft Outlook folder.) Whenever the user is offline and using Outlook 2016, the program works from this local copy and with the Offline Address Book (OAB). When the user is online, the cached mailbox and OAB are periodically updated from Exchange Server in the background. Any email messages the user drafted while offline are automatically sent when that user is back online. If a user upgrades from an earlier version of Outlook to Outlook 2016 and you previously configured Outlook for Cached Exchange Mode, those old Cached Exchange Mode settings are automatically applied, including a new synchronization control for shared mailboxes. The default location for new.ost or OAB files is:%userprofile% AppData Local Microsoft Outlook Offline Address Books.
As an administrator, you can configure a different.ost file location for users in your organization who do not already have.ost files. If you do not specify a different.ost file location, Outlook creates an.ost file in the default location when users start Outlook in Cached Exchange Mode. 'Mail to keep offline' setting The Mail to keep offline slider in the Server Settings dialog box in Outlook 2016 has been updated to apply to shared folders and lets you set a smaller synchronization window, available by default with Cached Exchange Mode in Outlook 2016. The slider allows an Outlook 2016 user to limit the email messages that are locally synchronized in an Microsoft Outlook data file (.ost). By default, if Cached Exchange Mode is enabled, Outlook 2016 caches email messages only from the last 12 months and removes anything older from the local cache for the PC. These default settings depend on the device, with mobile devices having smaller default settings. The email messages that are removed from the local cache are still available for users to view, but they’ll need to be connected to Exchange Server to view them.
Users can view messages that were removed from the local cache by scrolling to the end of a message list in a folder and clicking the message Click here to view more on Microsoft Exchange. Users can also change how much email to keep offline. You, the administrator, can change the default age or enforce the age of email messages that are removed from the local cache. Using Group Policy and the Office Customization Tool (OCT) Use the following procedures to configure Cached Exchange Mode settings by using the OCT or Group Policy. Remember that customizing Cached Exchange Mode settings is optional. Note. To get the Group Policy and Office Customization Tool (OCT) files, download the from the Microsoft Download Center.
The Office Customization Tool can only be used to configure volume licensed versions of Outlook, such as the version of Outlook that comes with Office Standard 2016. To configure Cached Exchange Mode settings by using the OCT.
In the OCT tree view, find Outlook, and click Add Accounts. In the Account Name column, click the account you want to configure, and click Modify to display the Exchange Settings dialog box. Click More settings. Click the Cached Mode tab. Click Configure Cached Exchange Mode, and select the Use Cached Exchange Mode check box to enable Cached Exchange Mode for users. (By default, Cached Exchange Mode is disabled.). Choose a default download option on the Cached Mode tab:.
Download only headers Users see header information and the beginning of the message. They can download the full message in several ways—for example, by double-clicking to open the message or by clicking Download the rest of this message now in the reading pane. Download headers followed by the full item All headers are downloaded first, and then full items are downloaded. The download order might not be chronological, but that shouldn't be noticeable to the user.
Microsoft Outlook downloads headers followed by full items in the folder that the user is currently accessing, and then it downloads headers followed by full items in folders that the user has recently viewed. Download full items Full items are downloaded.
We recommend this option unless you have a slow network connection. The download order might not be chronological, but that shouldn't be noticeable to the user. Microsoft Outlook downloads full items in the folder that the user is currently accessing, and then it downloads full items in folders that the user has recently viewed. You might want to pair this with the On slow connections, download only headers option. To configure Cached Exchange Mode settings using Group Policy.
In Group Policy, load the Outlook 2016 template. Open the Group Policy Management Console (GPMC), and in the tree view, expand Domains, and expand Group Policy Objects. Right-click the policy object that you want, and click Edit. The Group Policy Management Editor window opens. In the tree view, go to User Configuration Policies Administrative Templates Microsoft Outlook 2016 Account Settings Exchange Cached Exchange Mode.
In the reading pane, in the Setting column, open the policy that you want to set by double-clicking it. For example, in the Exchange reading pane, open Use Cached Exchange Mode for new and existing Outlook profiles.
Select Enabled, and select an option (if appropriate). To configure a default.ost location by using Group Policy. In Group Policy, load the Outlook 2016 template. Open the Group Policy Management Console (GPMC), and in the tree view, expand Domains, and then expand Group Policy Objects.
Right-click the policy object that you want, and click Edit. The Group Policy Management Editor window opens. In the tree view, go to User Configuration Policies Administrative Templates Microsoft Outlook 2016 Miscellaneous PST Settings. Double-click Default location for OST files to open it. Click Enabled to enable the policy setting. In the Default location for OST files text box, enter the default location for.ost files. For example:%userprofile% Local Settings Application Data Microsoft newfolder.
You can define a new default location for both Personal Microsoft Outlook data files (.pst) and.ost files. After you click PST Settings in the tree view, double-click to open the Default location for PST files setting in the reading pane. To prevent a new.ost file from being created.
In Group Policy, load the Outlook 2016 template. Open the Group Policy Management Console (GPMC), and in the tree view, expand Domains, and expand Group Policy Objects. Right-click the policy object that you want, and click Edit. The Group Policy Management Editor window opens. In the tree view, go to User Configuration Policies Administrative Templates Microsoft Outlook 2016 Account Settings Exchange.
Double-click Do not create new OST file on upgrade to open it. Click Enabled to enable the policy setting, and then click OK.
Additional Group Policy and OCT settings The following table shows some settings that you can configure for Cached Exchange Mode. In Group Policy, you can find the settings under User Configuration Policies Administrative Templates Microsoft Outlook 2016 Account Settings Exchange Cached Exchange Mode.
The OCT settings are in corresponding locations on the Modify user settings page of the OCT. Cached Exchange Mode settings Setting name Description Cached Exchange Mode Sync Settings Enable to configure how much user email that Outlook synchronizes locally by date of message. To allow all email messages regardless of date to synchronize to users' local mailbox cache, enable and select All from the list. By default, if you do not configure this setting, Outlook synchronizes email messages sent or received in the last 12 months to users' local mailbox cache (.ost). Disallow Download Full Items Enable to turn off the Download Full Items option in Outlook.
To find this option, choose the Send/Receive tab, and then choose Download Preferences. Disallow Download Headers Enable to turn off the Download Headers option in Outlook. To find this option, choose the Send/Receive tab. Disallow Download Headers then Full Items Enable to turn off the Download Headers then Full Items option in Outlook.
To find this option, choose the Send/Receive tab, and then choose Download Preferences. Disallow On Slow Connections Only Download Headers Enable to turn off the On Slow Connections Download Only Headers option in Outlook. To find this option, choose the Send/Receive tab, and then choose Download Preferences.
Download Public Folder Favorites Enable to synchronize Public Folder Favorites in Cached Exchange Mode. Download shared non-mail folders Enable to synchronize shared nonmail folders in Cached Exchange Mode. Use Cached Exchange Mode for new and existing Outlook profile Enable to configure new and existing Outlook profiles to use Cached Exchange Mode. Disable to configure new and existing Outlook profiles to use Online Mode. The following table shows some additional settings that you can configure for Exchange connectivity. In Group Policy, you can find the settings under User Configuration Policies Administrative Templates Microsoft Outlook 2016 Account Settings Exchange.
The OCT settings are in corresponding locations on the Modify user settings page of the OCT. Exchange connectivity settings Setting name Description Configure Outlook Anywhere (RPC over HTTP) user interface options Enable to let users view and change user interface (UI) options for Outlook Anywhere (RPC over HTTP). Do not allow an OST file to be created Enable to prevent offline folder use. Do not create new OST file on upgrade Enable to force Outlook 2016 to use the existing.ost file that was created by an earlier version of Outlook. If you disable or do not configure this setting (recommended), a new.ost file is created when you upgrade to Outlook 2016. Synchronizing data in shared folders Enable to control the number of days that elapses without a user accessing an Outlook folder before Outlook stops synchronizing the folder with Exchange. Related topics Feedback.