Office for Mac Issues

How to Fix Word for Mac Resetting Username and Initials After Restart

Phi Hung VoPhi Hung Vo Oct 22, 2026 869 views

Question details

The user needs to prevent Word for Mac from reverting their custom username and initials back to the default 'Microsoft Office User' and 'MOU'.

How to Fix Word for Mac Resetting Username and Initials After Restart
Product
Microsoft Word for Mac
Device & OS
macOS
Scenario
Configuring personal information and author details for document tracking and comments.
Observed behavior
Word repeatedly changes the configured username and initials back to 'Microsoft Office User' and 'MOU' after a system restart or overnight, even when the setting 'Always use this name and initials' is enabled.
Before you start

Ensure your Microsoft Office suite and macOS are updated to their latest versions. Additionally, check if you are logged into the same Microsoft account on multiple Mac computers, as this can cause profile synchronization conflicts.

Solution 1Recommended

Repair macOS Keychain and Verify Account Sync

Fixing potential keychain access issues can resolve profile synchronization problems that cause the username reset.

Word for Mac relies on the macOS Keychain to securely store and sync your Office identity credentials. If the keychain is corrupted or experiencing sync conflicts across multiple devices, your preferences may be continuously overwritten.

1
Check for Updates

Open Microsoft Word, go to 'Help' in the top menu bar, and select 'Check for Updates' to install any pending Office updates.

2
Open Keychain Access

Launch the 'Keychain Access' app on your Mac. You can find this by pressing Command + Space for Spotlight search and typing 'Keychain Access', or by navigating to Applications > Utilities.

3
Repair or Reset Keychain

Search for 'Microsoft Office' entries in the keychain. If Office is repeatedly requesting keychain access, you may need to delete the cached credentials or reset your default keychain settings to force Office to rebuild your profile correctly. Restart your Mac afterward.

4
Verify Account Sync on Other Macs

If you use Word on multiple Macs with the same Microsoft subscription, compare the user settings on both devices. Ensure the username and initials are configured identically to prevent cloud sync from overriding your preferences.

Repair macOS Keychain and Verify Account Sync
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Frequently Asked Questions

Why does Word for Mac keep changing my author name to Microsoft Office User?

This typically happens due to a synchronization conflict with your Microsoft account across multiple devices, or an issue with your Mac's keychain where Word fails to retrieve or permanently save your personalized identity data upon restart.

How do I change my username and initials in Word for Mac?

Go to the 'Word' menu at the top of your screen, select 'Preferences', and click on 'User Information'. Enter your preferred name and initials, and check the box that says 'Always use this name regardless of how I'm signed in to Office'.

Can using Word on multiple Macs cause my settings to reset?

Yes. If you use the same Microsoft account on two different Macs (such as a home and work computer), conflicting synchronization data can cause your local preferences, including your username and initials, to be overwritten or reset overnight.