Fix Outlook Sent Folder Not Updating for Exchange ActiveSync
Question details
The Outlook Sent folder stops syncing for Exchange ActiveSync accounts, and sent emails only appear on the webmail server.
- Product
- Microsoft Outlook 2019
- Device & OS
- Windows 10
- Scenario
- Syncing sent emails and contacts using an Exchange ActiveSync account hosted by third-party providers.
- Observed behavior
- The Sent folder fails to update locally in Outlook, sent messages remain visible only on the server, and a continuous 'Updating contacts' loop causes contact duplication.
Ensure you have access to your webmail interface to verify that your sent emails are actually being delivered and stored safely on the server.
Verify Exchange ActiveSync Settings and Test Webmail
Confirm your server settings and ensure the account can properly communicate with the webmail server to rule out local Outlook sync issues.
Often, Outlook stops syncing specific folders when there is a mismatch in server configuration or a temporary disruption with the host. Verifying webmail confirms the server is working correctly.
Open a web browser and log into your email provider's webmail interface to confirm that the messages you recently sent from Outlook are visible in the server's Sent folder.
In Outlook, click on the File tab, navigate to Info, and select Account Settings > Account Settings.
Select your Exchange ActiveSync account from the list and click Change. Ensure the mail server address matches the exact details provided by your hosting provider.
Troubleshoot Contact Synchronization Loops
Address the 'Updating contacts' message that causes duplication and blocks the Sent folder from syncing.
Collect Sync Logs and Contact Your Hosting Provider
If local troubleshooting fails, gather diagnostic logs to help your hosting provider resolve server-side ActiveSync issues.
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Frequently Asked Questions
Why are my sent emails showing on webmail but not in Outlook?
This typically occurs when the local Outlook client fails to sync properly with the Exchange ActiveSync server. It is often caused by a corrupted offline data file (.ost) or the sync process being blocked by an active loop in another folder, such as Contacts.
How do I stop the 'Updating contacts' loop in Outlook 2019?
You can try stopping the loop by temporarily working offline (Send/Receive > Work Offline), cleaning up massive duplicate contacts, or repairing your Outlook profile from the Control Panel under the Mail settings.
Does recreating the email profile fix Exchange ActiveSync sync issues?
Sometimes. Creating a new Outlook profile forces the application to rebuild the local offline data file (.ost) from scratch. However, if the issue stems from a server-side active sync restriction or an infinite contact loop pushed from the server, recreating the account may not permanently resolve it.
