Microsoft Account Errors

How to Fix Microsoft 365 Account Name Reverting to Old Name

Steve K Oct 12, 2026 868 views

Question details

The user's Microsoft 365 account continues to display its previous name even after an administrator has updated it.

How to Fix Microsoft 365 Account Name Reverting to the Old Name

Product: Microsoft 365
Device & OS: not provided
Scenario: The user or administrator wants the newly updated account name to properly sync and display across all Microsoft applications and devices.
Observed behavior: The account name keeps reverting to the old name and fails to sync the new changes across installed applications.

Before you start

Ensure you have your Microsoft 365 login credentials handy and verify with your IT administrator that the name change was successfully saved in the admin center.

Solution 1Recommended

Sign Out and Re-sign In Across All Devices

Clear cached account credentials by signing out of all Microsoft applications to force the new name to sync from the servers.

Microsoft applications often cache your account information locally. Signing out everywhere clears this cache and forces the app to fetch your updated display name from the Microsoft 365 servers.

Open a Microsoft App

Launch any Microsoft 365 application, such as Word, Excel, or Teams, on your computer or mobile device.

Sign Out

Click on your profile picture or account initials at the top right corner of the application window and select 'Sign out' from the dropdown menu.

Repeat on All Devices

Repeat this sign-out process for all Microsoft applications across every active device you use (smartphones, tablets, and secondary PCs).

Sign Back In

Once signed out everywhere, restart your applications and click 'Sign in' to log back into your account. Check if the updated name is now displayed.

Sign Out and Re-sign In Across All Devices

Sync Delay: It can take up to 24 hours for account changes to fully propagate across all Microsoft 365 services and applications.

Solution 2

Re-apply Name Change in Microsoft 365 Admin Center

For administrators, re-applying the user name changes can push the update if the initial sync stalled.

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Frequently Asked Questions

How long does it take for a Microsoft 365 display name change to take effect?

It typically takes up to 24 hours for a display name change to fully sync across all Microsoft 365 apps and services, including Exchange, Teams, and Outlook.

Why is Microsoft Teams still showing my old account name?

Microsoft Teams has a persistent local caching system that can hold onto old account names longer than other apps. Manually signing out, clearing the Teams cache folder on your computer, and signing back in will force the new name to appear.

Can I change my Microsoft 365 account name myself?

If you are using a work or school account, you usually cannot change your display name yourself. You must contact your organization's IT administrator to make the change via the Microsoft 365 Admin Center.

Login & Account Issues