
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. It seems like there is a disconnect between O365 and exchange which is super weird to me… Create your account and connect with a world of communities.
Why is Microsoft 365 not syncing?
O365 User changes not syncing to Exchange (Hybrid Environment with AD connect)
Microsoft 365 provides essential productivity services that allow users to collaborate across devices and locations. This includes enabling the synchronization of email, calendar appointments, contacts, tasks, and notes seamlessly between different platforms. However, sometimes sync issues can occur, which lead to changes not syncing properly or data not staying up to date between connected services and apps. In this guide, we will provide you with comprehensive troubleshooting instructions to identify and resolve the most common Microsoft 365 synchronization problems that may arise.
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I’ve tried the Microsoft office uninstall tool provided by Microsoft (which deletes more items then just control panel uninstall). Now, restart Outlook and check if Outlook synchronization is working. I’m at wits end and Microsoft stopped helping me because they feel the problem is on our end. However, I cannot find any reason why his account would do this only on our domain nothing is blocking our connection to Office 365. However once I joined this computer back to the domain and let it sit for a few days it was also working fine.
This tool is designed to extract mailbox items from orphaned or inaccessible OST files. A large OST file can lead to performance issues and result in Outlook not syncing with the Exchange Server, disrupting your workflow. To resolve this, you can reduce the Outlook data file (OST) size. This can help optimize Outlook’s performance and fix the synchronization issues. We’ve had sync issues with employees from time to time however, re doing the mail profile or wiping the Windows profile usually fixes it. In some cases setting up a new computer replacement was the only option to fix these odd Outlook Sync issues.
Method 2: Check if the Work Offline Mode is Disabled
However, with one particular client no matter what changes are made these sync issue still occur. Here is the strange part I tried to remove the computer from the domain and have Outlook run from a local account for a few days. I’ve been in contact with Microsoft they had me migrate his account\data to another server this did not fix it.
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Want to chat about how Microsoft 365 can benefit your business? During the scanning process, security applications, like antivirus software or Windows Firewall might lock the Outlook data file, leading to the sync issues. To check if the security application is causing the issue, you can temporarily disable the antivirus program or Firewall and then update the folders. If the issue is resolved, it indicates that your antivirus software or Firewall is interfering with Outlook. To resolve this, you can add Outlook and its related processes as exception in your security software or consider switching to a security application that is compatible with Outlook.
- To resolve this, you can reduce the Outlook data file (OST) size.
- I’m at wits end and Microsoft stopped helping me because they feel the problem is on our end.
- I then check out her profile in exchange admin console and see that none of the changes I made have reflected there, except for her new UPN…
- Want to chat about how Microsoft 365 can benefit your business?
- During the scanning process, security applications, like antivirus software or Windows Firewall might lock the Outlook data file, leading to the sync issues.
- I’ve been in contact with Microsoft they had me migrate his account\data to another server this did not fix it.
- Below are the steps I’ve taken to try to resolve this issue.
Method 5: Check Outlook Account Settings
The client has a computer off the domain at home that his work email is tied to and he has never had any of these issues in Cache mode with that device. I’ve unchecked download shared folders when setting up a new Outlook profile. I’m running into an issue with syncing my MS account across my MS 365 Office apps. I’m signed in on my windows account and my one drive seems to be working but when I open word, excel, onenote, etc.

Fixing problems with directory synchronization for Microsoft 365
Once the client started using Outlook again after some time has passed the issue had come back. I ran the PSTscan tool to check for anomalies on the OST file (which it found and repaired but the issue still occurs). Below Microsoft 365 troubleshooting are the steps I’ve taken to try to resolve this issue.
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