New Teams Meeting in Outlook with multiple accounts

**HERE IS THE REAL SOLUTION**

1. The culprit: Teams account configuration

In a July 2026 Reddit thread, someone reported:

• Using Classic Outlook with multiple Microsoft 365 tenants.
• The Teams add-in stopped allowing them to select which account hosted meetings.
• Outlook defaulted to the first account signed into Teams.
• Reinstalling Teams and the add-in didn't resolve it.

On October 12, someone reported finding a fix. 

https://www.reddit.com/r/MicrosoftTeams/comments/1uy9vqv/outlook_teams_addin_cant_switch_accounts/

2. The fix

Teams can incorrectly write allowOutlookAddin: false into its configuration file, disabling the Outlook add-in integration for an account.

Here's the reported fix:

1. Completely close Outlook and Teams.
2. Open File Explorer.
3. Navigate to:
   %LOCALAPPDATA%\Publishers\8wekyb3d8bbwe\TeamsSharedConfig
4. Find the file named tma_settings.json.
5. Rename it to tma_settings.json.bak rather than deleting it.
6. Restart Teams.
7. Switch into both <Tenant 1> and <Tenant 2> within Teams so their settings regenerate.
8. Open Outlook Classic.

Now create a test meeting from your Tenant 1 calendar.

Expected result: The Teams Meeting button should once again allow you to select which account hosts the meeting. And the URL that gets generated should correctly link to the Tenant you selected.