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This means that the authentication setup for your sync is no longer valid. This can happen for the a number reasons particularly if your sync authenticates using Delegated Permissions. To update from Azure AD Sync to Microsoft Entra Connect, see the upgrade instructions.
Top questions it leaders have about microsoft copilot (and how to answer them)
- I have a user who is having trouble syncing with Microsoft 365.
- The idea is to provide a recycle bin of users who you can delete when you no longer need them.
- The Users Loaded count will be 0 if all users fail to meet the system's requirements for user records.
- The M365 sync establishes a synced dataset based on your M365 data and the filtering configuration of your sync.
- You can run a Manual Sync from the Microsoft 365 Sync page.
- The error message in the Summary sheet of the Sync Summary spreadsheet attachment can also highlight the reason for this.
- The Sync Summary email can give further information about this.
- A vast community of Microsoft Office365 users that are working together to support the product and others.
- It could be due to incorrect login details, administrator password resets, or account lockouts after multiple failed attempts.
If your Office 365 is not working properly because it’s outdated, support can handle update problems that prevent essential patches and security fixes from being installed. It seems to be some sort of error with the user not being able to connect and sync with M365 servers. This also started happening out of nowhere about a week Office 365 sync problems and login fixes ago. A vast community of Microsoft Office365 users that are working together to support the product and others.
I got an error message that my company has exceeded the number of objects that can be synchronized
Contact MicroSec today and let our experts handle your Office 365 troubleshooting needs carefully and fix MFA prompts not working professionally. A diagnostic tool that automatically detects and fixes common Office 365 problems. We have reset the router, checked internet speeds, signed in and out of M365 apps, reinstalled apps and checked for Windows updates.

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

TrustedTech delivers unbeatable customer service, with experts in licensing and high-level technicians always on-call to answer your tech issues in-depth. To resolve these issues you should run the steps in this article and check whether the groups in your sync's filtering preference contain users in Azure FixTechGuide mailbox repair steps AD. The Sync Summary email can give further information about this. The Users Loaded count will be 0 if all users fail to meet the system's requirements for user records.
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.