Fix Microsoft 365 Sync Issues: Expert Q&A Guide

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Sync failure alerts do not always include a full summary or attachment, you can run a test sync to obtain this data.



Troubleshoot Office 365 Sync and Login Issues

You can close the wizard at this point as you do not need to complete it for re-authentication to take effect. You should run a test sync after re-authenticating the sync to ensure it is working. It could be due to incorrect login details, administrator password resets, or account lockouts after multiple failed attempts. Whether it’s a Microsoft Office 365 sign-in problem or a password reset issue, here’s how to get back in securely.

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  • The Users Processed count will be 0 is there are no users in the synced dataset after filtering.
  • You'll also receive a mail (to the alternate email and to your admin email) from Microsoft 365 that indicates your tenant has encountered directory synchronization errors.
  • Similarly you should review the Users Deactivated sheet on the sync summary spreadsheet attachment as you can also delete these users to bring your total down.
  • Contact MicroSec today and let our experts handle your Office 365 troubleshooting needs carefully and professionally.
  • Whether you’re struggling with Microsoft 365 sign-in problems, Office 365 not working, or syncing issues, our team is here to help.
  • After you run the commands, and if they completed without errors, you may see a quick progress indicator or a status result that contains information about the package installation.
  • This also started happening out of nowhere about a week ago.


With apps syncing across devices and cloud services, sync issues are among the most frequently reported M365 problems. These can include missing files, ghost icons, or documents that do not update in real-time. The M365 sync establishes a synced dataset based on your M365 data and the filtering configuration of your sync. The sync will fail if it can't find any users that comply with Fix Outlook Not Opening After Windows Update your filtering preferences or the system's requirements for user records. The system requires that users have a first name, last name and a valid email address that conforms with your domain lock if enabled. The sync does not delete users but rather sets them to inactive.

I got an error message that my company has exceeded the number of objects that can be synchronized



Our licensing engineers can help triage complex problems and ensure you're on the right support path. The error message in the Summary sheet of the Sync Summary spreadsheet attachment can also highlight the reason for this. Both of our authentication methods can fail if the Enterprise Applications entry for the sync in Azure AD is deleted or Microsoft Outlook Email Repair Tool Online if it has had its permissions modified. You can stop any accounts from being brought over by adding them to the sync deny list. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

Troubleshoot Office 365 Sync and Login Issues

What should I do if my sync failed due to authentication issues?



Troubleshoot Office 365 Sync and Login Issues

For details see Identify directory synchronization errors in Microsoft 365. Real-time collaboration is at the core of Microsoft 365; however, issues can arise due to permissions, software version conflicts, or connectivity problems. We go above and beyond the average software reseller because we built our business on trust. As active members in the IT community, we work to support our clients’ businesses and provide them with peace of mind. Find out what to do if you are having issues with syncing FixTechGuide Outlook Repair Tutorial users or groups from Microsoft 365.

Tools & Methods To Use to Troubleshoot Office 365 Issues





The most common reason for missing users is that you've run a Test Sync, instead of a Manual Sync. You can run a Manual Sync from the Microsoft 365 Sync page. If that doesn't resolve your missing users issue, please follow our guide to troubleshooting missing users below. Whether you’re struggling with Microsoft 365 sign-in problems, Office 365 not working, or syncing issues, our team is here to help. Don’t let technical problems affect your productivity—contact us for immediate assistance.
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