How to Fix Outlook Syncing issues?

Persevering with these troubleshooting steps will help identify and rectify many common Microsoft 365 synchronization problems. If the size of your .ost file is close to the limit, you could try increasing the limit on your client, restart Outlook and see if there is any difference. Manually forcing synchronizations in this manner can help surface any intermittent errors and confirm if fixes have resolved the issues. Now, manually sync your mailbox using the Update Folder button under the Send/Receive tab. If I check the sync log I see a lot of sync errors for Inbox, sent items and a few other folders. You can check the error message to find the cause behind the sync issue and fix it.

Reasons behind Sync Issues in Outlook

However, his OST file is not anywhere near that size it’s about 5GB. If the problems do not occur in safe mode, its most likely an add-in causing grief. I was wondering if anyone had some insight into an issue I am having with a client.

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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.

A Troubleshooting Guide To Microsoft 365 Sync Issues

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.

• We have a Hybrid environment with a lot of our accounts being created on premise in Active Directory and syncing to O365 and exchange.
• However, I cannot find any reason why his account would do this only on our domain nothing is blocking our connection to Office 365.
• Once you have explored the basics like internet connectivity and updated software, examining any error reports becomes critical to zeroing in on the problem.
• If restarting Outlook or fixing the profile doesn’t work, converting the OST file is often the next step.
• I still have it turned on on my laptop and it has not shown any issues yet.
• I get a “We’re having trouble syncing. Click “Sign in again” to fix this issue” error at the top of window.

We have resources to help you identify potential issues and fix them. After rebuilding the OST file, it’s important to check for any missing mailbox data. If you find any missing items in the new OST file, you can recover them from the backup OST file using Stellar Converter for OST. This professional OST to PST converter tool can extract data from the backup OST file and convert it into PST file, which you can easily import into Outlook. You can easily search for the missing items, select them, and save them in PST and other file formats, such as MSG, EML, RTF, HTML and PDF.

How to Fix Outlook Sync Issues in Windows?

Tried searching online for a solution but didn’t find a solution. To update from Azure AD Sync to Microsoft Entra Connect, Microsoft 365 account recovery help see the upgrade instructions.