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How to Fix Microsoft Loop Showing Unexpected Outlook Email Addresses

Phi Hung Vo Sep 28, 2026 869 views

Question details

Users in a personal Microsoft Loop workspace are seeing unexpected Outlook email addresses instead of their primary ones, which prevents them from successfully tagging or @mentioning each other.

How to Fix Microsoft Loop Showing Unexpected Outlook Email Addresses

Product: Microsoft Loop
Device & OS: not provided
Scenario: Attempting to collaborate and tag members using @mentions in a personal Microsoft Loop workspace.
Observed behavior: Workspace members are assigned unexpected Outlook addresses, causing the @mention tagging feature to fail, despite users signing in with their correct email accounts.

Before you start

Verify whether you are using a personal Microsoft account or a business (school/work) account, as Microsoft Loop handles identity and permissions differently across these account types.

Solution 1Recommended

Verify Workspace Type and Review Membership Settings

Determine if the workspace is set up as personal or business, as personal workspaces have limitations on @mentions and directory syncing.

Microsoft Loop distinguishes heavily between workspaces created with personal accounts and those created within a Microsoft 365 Business environment. Personal workspaces do not support the same robust identity syncing and tagging features, which often leads to the system generating default Outlook aliases.

Log into Microsoft Loop

Navigate to the Microsoft Loop web interface and open the specific workspace where the tagging issue is occurring.

Check the account type

Click on your profile icon in the top right corner to confirm if you are signed in with a personal Microsoft account rather than a work or school account.

Review workspace members

Click on the workspace members list to review the current email addresses assigned to each user. Note any discrepancies between their actual login email and the displayed Outlook address.

Assess tagging limitations

If the workspace was created with a personal account, understand that @mention features may not fully support syncing custom email domains. You may need to rely on direct link sharing instead of in-line tagging.

Verify Workspace Type and Review Membership Settings

Account Limitations: Workspaces created with personal accounts often lack the advanced directory syncing found in Microsoft 365 Business environments, resulting in limited @mention capabilities.

Solution 2

Check and Update Microsoft Account Aliases

Ensure that the primary alias on the affected Microsoft accounts is set correctly and that no unexpected Outlook aliases are interfering.

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Frequently Asked Questions

Why can't I @mention someone in my personal Microsoft Loop workspace?

Personal Microsoft Loop workspaces have limited identity and permission features compared to business versions. If the system fails to recognize the user's primary email and assigns a default Outlook alias, the @mention feature may not work as expected.

Can I change the email address displayed in Microsoft Loop?

Loop draws its display information from your overarching Microsoft account profile. You can try updating your primary email alias in your Microsoft account settings at account.microsoft.com, though personal Loop workspaces may take time to sync these changes.

Is there a difference between personal and business Loop workspaces?

Yes. Business workspaces integrate with Microsoft Entra ID (formerly Azure AD) for robust user management, directory syncing, and accurate tagging. Personal workspaces rely on standard Microsoft accounts, which offer limited collaborative identity management.

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