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

Phillipp Vanderpool 2026-01-18 16:52:01 +08:00
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Content<br>
If it didn’t, a few targeted checks usually restore access—no need to keep resetting your password over and over. The other solution to fix Outlook sync issues is recreating Microsoft Outlook profile. We start by checking that Azure AD Connect is running and password sync is enabled. If it’s in Staging Mode or a recent change didn’t trigger a full sync, passwords won’t update in Microsoft 365.
The sync will fail if it can't find any users that comply with your filtering preferences or the system's requirements for user records.After performing these steps, Outlook’s all folders will be synced to the server.To get the sync working you will either need to delete users or have the user limit on your account increased.This blog talks about the causes behind Outlook synchronization errors and a few solutions to fix Outlook sync issues.Check that your password change actually synced between your on-premises Active Directory and Microsoft Entra ID (formerly Azure AD).That tells us if the new credentials made it to the cloud directory.If the old password still works, the reset probably hasn’t synced.
Troubleshooting Microsoft 365 sync issues
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. 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. Knowing the reasons behind the Outlook sync issues will help us to fix this problem and prevent issues in communication and workflow.
Common Reasons Behind Outlook Sync Issues
Sometimes, rejoining the device to Azure AD or just reauthenticating in Office apps does the trick. [work offline mode stuck](https://ashok.websitedemourl.com/read-blog/12179_how-to-fix-quot-outlook-365-stuck-at-updating-inbox-and-outbox-quot.html) 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.
Address
Now, we will verify the server settings to fix the Outlook synchronization error. Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not. The M365 sync establishes a synced dataset based on your M365 data and the filtering configuration of your sync.
Get Expert Help from TrustedTech
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 attachment, you can run a test sync to obtain this data. With directory synchronization, you can continue to manage users and groups on-premises and synchronize additions, deletions, and changes to the cloud. But setup is a little complicated and it can sometimes be difficult to identify the source of problems. We have resources to help you identify potential issues and fix them.
What should I do if my sync failed due to authentication issues?
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. The [repair PST file without data loss](https://1nigeria.radiobenue.be.gov.ng/read-blog/2300_outlook-365-not-opening-after-i-unchecked-quot-cached-exchange-mode-quot-microso.html) idea is to provide a recycle bin of users who you can delete when you no longer need them. You can view your inactive users on the Users page and delete them as you see fit.
This blog talks about the causes behind Outlook synchronization errors and a few solutions to fix Outlook sync issues. We have shared five manual methods in this blog to resolve the Outlook syncing errors. Apart from this, we also discuss the Shoviv OST to PST Converter Tool, a professional way to repair, recover, and convert Outlook data files. This solution will be beneficial for users who are facing Outlook syncing issues because of corrupted PST or OST files. Users can also try its free demo version in their system and process the first 50 items from each folder freely.
The sync will fail if it can't find any users that comply with 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. Microsoft 365 is a robust platform, but when problems arise, fast resolution is key to productivity. From sync errors to sign-in challenges and collaboration setbacks, these common Office 365 troubleshooting techniques can restore service quickly. After performing these steps, Outlook’s all folders will be synced to the server.
Devices sometimes keep using cached passwords even after a successful sync. If users access multiple apps with the same login, we make sure Single Sign-On (SSO) settings line up so the new password works everywhere in Microsoft 365. 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 tell users to sign out completely and remove stored credentials from Windows Credential Manager or their device’s keychain.
We check that the Work or School Account in Windows Settings is active and linked to the right domain. The sync will fail if the groups you selected to load users from no longer exist in Azure AD. Typically this is because the selected groups have been deleted from Azure [resolve Outlook not sending emails fast](https://code.swecha.org/penneyackerman/outlook-profile-repair-and-recovery-steps1998/-/issues/1) AD since the M365 sync was configured on your account.