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 This means that the authentication setup for your sync is no longer valid.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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Outdated credentials get stuck on devices, password sync gets turned off, or Microsoft Entra Connect just doesn’t update like it should. Here’s a step-by-step approach to help you spot the issue, fix it, and avoid these sync delays down the road. While M365 is highly stable, it’s not immune to occasional disruptions. We also check the synchronization scheduler to confirm delta and full sync cycles finish successfully.

What to do when Office 365 password reset doesn’t sync across devices

I have multiple users experiencing sync errors with Outlook and office365. Another which is shown below, is a user opens a new message, or replies to one, and lets it sit for a while. When they go back to the message and press send they get an error that the message has been deleted. Ive repaired the OST and changed cache mode to only cache 1 year. With directory synchronization, you can continue repair PST file without data loss to manage users and groups on-premises and synchronize additions, deletions, and changes to the cloud.

Login & Sync Errors: Personal & Business Microsoft 365 Accounts on Same Device

Start by disconnecting the device from Work or School Account settings, then reconnect with the user’s updated password. Cached credentials on Windows or mobile devices can block the update. We tell users to sign out and sign back in with the new password. Running the Azure AD Connect Health tool gives you alerts for sync errors and interruptions. Keeping Azure AD Connect up to date and testing sync regularly helps password resets flow like they’re supposed to.

Reviewing Device Sign-In Settings

You can view your send/receive error 0x800CCC0E fix inactive users on the Users page and delete them as you see fit. 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. If sync keeps failing, we make sure the Microsoft Entra Connect service account has the right permissions and the server connects to the domain controller. Updating Azure AD Connect to the latest build often fixes known sync issues.



Microsoft 365 is a robust platform, but when problems arise, fast resolution is key to productivity. From sync errors to sign-in challenges and Outlook profile repair and recovery steps collaboration setbacks, these common Office 365 troubleshooting techniques can restore service quickly. If you don't wish an inactive user to be made active by the M365 sync, you can add the user's email address to the sync forbid list. You can do this in the Microsoft 365 Sync Wizard on the configuration page of your platform settings. The most common reason for missing users is that you've run a Test Sync, instead of a Manual Sync. If that doesn't resolve your missing users issue, please follow our guide to troubleshooting missing users below.

Common Causes of Office 365 Password Reset Sync Issues

• Even I've only been doing this with test users so far, so haven't actually broken any actual users yet, I still need to get this resolved quickly.
• We also scan Event Viewer logs under Applications and Services Logs → Directory Synchronization for Event IDs like 650–657 (for sync activity).
• Sync failure alerts do not always include a full summary or attachment, you can run a test sync to obtain this data.
• For managed environments, we use Intune or Group Policy to force sign-in credential sync and clear old tokens.
• The system requires that users have a first name, last name and a valid email address that conforms with your domain lock if enabled.
• You can stop any accounts from being brought over by adding them to the sync deny list.
• Users I create within the Office 365 portal are fine, so I assume it is something to do with Azure AD Connect.

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.