
For managed environments, we use Intune or Group Policy to force sign-in credential sync and clear old tokens. Boost your SMB’s security and compliance with Microsoft 365 Business Premium. Discover Defender and Purview add-ons for enterprise-grade protection at SMB-friendly pricing. This means that the authentication setup for your sync is no longer valid.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. You will need to have the correct privileges set on your Azure account in order to set up the M365 sync.
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We tell users to sign out completely and remove stored credentials from Windows Credential Manager or their device’s keychain. Sometimes, rejoining the device to Azure AD or just reauthenticating in Office apps does the trick. This pops up a lot after admins reset a password in the Microsoft 365 admin center. That changes the password in Microsoft Entra ID, but not right away in your local Active Directory. You end up with mismatched passwords between the cloud and your local network. The Users Loaded count will be 0 if all users fail to meet the system's requirements for user records.
What to do when Office 365 password reset doesn’t sync across devices

Real-time collaboration is at the core of Microsoft 365; however, issues can arise due to permissions, software version conflicts, or connectivity problems. Find out what to do if you are having issues with syncing users or groups from Microsoft 365. It seems to be some sort of error with the user not being able to connect and sync with
Outlook data file cannot be accessed M365 servers. We also scan Event Viewer logs under Applications and Services Logs → Directory Synchronization for Event IDs like 650–657 (for sync activity). Errors like Event ID 611 point to invalid replication data or outdated software. On the sync server, we open the Synchronization Service Manager and check that the last sync finished without errors.
Login & Sync Errors: Personal & Business Microsoft 365 Accounts on Same Device

Bad settings in Azure AD Connect cause lots of password sync failures. If password writeback isn’t enabled or the service account doesn’t have the right permissions, new passwords won’t update in Active Directory. That leaves people locked out with their new password on the cloud but not locally. We show users how to reset passwords using approved methods like the Microsoft 365 portal or self-service password reset (SSPR). If someone changes their password only in the cloud or just on a local system, things can get out of sync pretty quickly.
Reviewing Device Sign-In Settings

The Summary sheet on the spreadsheet attachment of your sync summary includes an Updated User Count and User Limit. These figures will give you an impression of how far over the limit the account is. Sync failure alerts do not always include a full summary or
Outlook Stuck on Synchronizing Folders attachment, you can run a test sync to obtain this data.
You'll also receive a mail (to the alternate
Office 365 sync problems and login fixes email and to your admin email) from Microsoft 365 that indicates your tenant has encountered directory synchronization errors. For details see Identify directory synchronization errors in Microsoft 365. We check that the Work or School Account in Windows Settings is active and linked to the right domain. If there’s a sync error, we disconnect and reconnect the account.
Common Causes of Office 365 Password Reset Sync Issues
- You can run a sync manually with PowerShell or the Azure AD Connect tool to make sure updates go through.
- Devices sometimes keep using cached passwords even after a successful sync.
- The mailbox says it migrated okay, but I find it can't be accessed, even by another user created in Office 365.
- The Summary sheet on the spreadsheet attachment of your sync summary includes an Updated User Count and User Limit.
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First, we check that the password reset finished in Microsoft 365 or Microsoft Entra ID. The user should log in to the Office 365 web portal with the new password. If the old password still works, the reset probably hasn’t synced. To avoid this, double-check that password writeback is turned on and working. You can run a sync manually with PowerShell or the Azure AD Connect tool to make sure updates go through. Checking the sync logs helps confirm password changes are making it everywhere they should.