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.

O365 User changes not syncing to Exchange (Hybrid Environment with AD connect)

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.

Openreach Takes Next Step in UK’s PSTN Landline Switch-Off.

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.

MS 365 account not syncing across office apps

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.

OST Recovery and migration

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.

• If I check the sync log I see a lot of sync errors for Inbox, sent items and a few other folders.
• 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?
• 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 11: Clear Outlook Cache

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 Resolve Sync Issues in Outlook – A Detailed Guide

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 Repair Office 365 installation errors are the steps I’ve taken to try to resolve this issue.