Fix Cannot @Mention a Specific User in Microsoft Lists and Word
Question details
A specific team member does not appear in @mention suggestions across Microsoft Lists, Word, and other Microsoft 365 applications.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Attempting to tag or @mention a specific team member in a list item or document comment.
- Observed behavior
- The user's name does not populate in the @mention suggestions, even though they belong to the team and share the same policies as others.
Ensure that the affected user has an active Microsoft 365 license and has successfully logged into their account recently.
Verify Mention Functionality Across Microsoft 365 Apps
Determine if the issue is isolated to Microsoft Lists or affects the entire Microsoft 365 tenant.
Before escalating the issue, it is important to confirm whether this is a local synchronization bug in Microsoft Lists or a broader account profile issue within your Microsoft 365 environment.
Open a Microsoft Word document stored in SharePoint or OneDrive, insert a new comment, and type '@' followed by the affected user's name.
Open a shared Excel workbook, add a comment to a cell, and attempt to mention the user to see if their name populates.
Ask another team member to try mentioning the same user in their documents to see if the issue is specific to your device or affects everyone.
Open a Support Ticket via Microsoft 365 Admin Center
If the user cannot be mentioned across multiple apps, the issue requires backend investigation by Microsoft.
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Frequently Asked Questions
Why do @mention suggestions stop working for specific users?
This is usually caused by backend synchronization issues in Azure Active Directory (Entra ID) or a glitch in the user's Microsoft 365 profile routing.
Can a user's permission level affect their visibility in @mentions?
Yes, if a user does not have at least read access to the specific Microsoft List or document, their name may not appear in the mention suggestions.
Is there a workaround to assign a user if @mention fails?
Yes, you can manually assign the user using the 'Assigned To' column in Microsoft Lists or share the document directly via email link while the issue is being resolved by support.
