Troubleshooting Microsoft 365 sync issues usecure Help Centre

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We tell users to sign out and sign back in with the new password.



Troubleshoot Office 365 Sync and Login Issues

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 This means that the authentication setup for your sync is no longer valid.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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If a password reset in Office 365 isn’t syncing, users usually get sign-in errors or find old credentials still hanging around on devices. We focus on restoring sync between Microsoft Entra ID (Azure AD), on-premises Active Directory, and user devices so everyone gets back in without headaches. If password sync is off or the server is in staging mode, passwords won’t update. We turn password sync back on by running the Entra Connect configuration wizard and picking Customize synchronization options. Check that your password change actually synced between your on-premises Active Directory and Microsoft Entra ID (formerly Azure AD). If it didn’t, a few targeted checks usually restore access—no need to keep resetting your password over and over.

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 Repair Outlook Profile Online 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 Errors like Event ID 611 point to invalid replication data or outdated software.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



Troubleshoot Office 365 Sync and Login Issues

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



Troubleshoot Office 365 Sync and Login Issues

Waiting a few minutes after changing the password often clears Outlook data file cannot be accessed up short-term sync issues. We look at audit logs in the Microsoft 365 admin center to see when and where the password changed. That tells us if the new credentials made it to the cloud directory. We usually check settings like Password Writeback, Synchronization Rules Editor, and Service Account Permissions to spot misconfigurations. Sometimes a missing or outdated connector blocks the link between Microsoft Entra ID and your local domain controller.

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Password sync usually fails when credentials don’t update between Microsoft Entra ID (Azure AD) and your on-premises Active Directory. Most of the time, the problem comes from timing delays, configuration mistakes, or cached credentials on devices that don’t pick up new passwords. We check that Microsoft Entra Connect (Azure AD Connect) runs the latest version and password sync is on. Keeping things updated helps avoid compatibility issues between on-premises Active Directory and Microsoft 365. If problems stick around, we rejoin the troubleshoot Outlook synchronizing folders error devices to Microsoft 365 services.



  • If a password reset in Office 365 isn’t syncing, users usually get sign-in errors or find old credentials still hanging around on devices.
  • Our relationship to the Microsoft Partner Network allows us to provide competitive pricing and authentic software and support, all with a much-needed human element.
  • On macOS or iOS, delete stored credentials from Keychain Access.
  • Checking the sync logs helps confirm password changes are making it everywhere they should.
  • This can happen for the a number reasons particularly if your sync authenticates using Delegated Permissions.
  • Bad settings in Azure AD Connect cause lots of password sync failures.


TrustedTech delivers unbeatable customer service, with experts in licensing and high-level technicians always on-call to answer your tech issues in-depth. TrustedTech is a Microsoft CSP Direct Bill Partner with all six Solutions Partner designations and decades of expertise in licensing, support, and cloud infrastructure. If you're looking for smarter ways to manage, secure, or optimize your Microsoft 365 (M365) environment, our U.S.-based team is here to help. 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 if it has had its permissions modified. I didn't try logging in originally, I just assumed they'd work, and so tried migrating mailboxes.
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