Teams seams to be generating a random email address when recipients respond to a meeting request

Hi @AB

Welcome to Microsoft Q&A forum 

 

According to your description, the error may indicate the problem when Microsoft Teams and Outlook work together. When someone tries to accept a meeting invite, the response gets sent to a temporary or fake email address created by Exchange Online. This happens because of a mismatch or sync issue between your actual email address and the settings in Teams or Outlook. It could be caused by errors in your user profile, issues with add-ins, or incorrect configuration, even if your Teams account shows the right email. 

(For more information, please refer: How Exchange and Microsoft Teams interact - Microsoft Teams | Microsoft Learn ) 

 

To better understand, may I clarify: 

1.Are you using a Microsoft personal account or business account? 

2.Do you see the meeting invite in your Teams calendar or Outlook calendar? 

3.Can you share a screenshot of the error message or the full bounce-back email? 

4.Are other recipients in your organization experiencing the same issue when accepting the invite? 

 5.Please ensure your Teams and Outlook are in the latest version 

 

In the meantime, please try: 

 

1.Check Account Status  

-If you’re using a personal Microsoft account, log in to Outlook web or Outlook Desktop app to ensure the account is active and not disabled or locked. 

-If you’re using a business account, confirm with your IT administrator that your email account is active and properly configured to receive external emails. 

 

2.If the invite was sent to an unfamiliar or outdated email address, try resending it directly to your current primary email. 

 

3.Check Teams Add-in in Classic Outlook:  

-Open Outlook in Classic version by turning off the toggle switch in the top-right corner labeled "New Outlook." 

-File > Options > Add-ins. 

-Select COM Add-ins > Go. 

-Ensure Microsoft Teams Meeting Add-in for Microsoft Office is checked (enabled). Click OK. 

 

4.Restart Applications:  

-Close and reopen Outlook and Teams. 

 

5.Repair Microsoft Office:  

-Go to Control Panel > Programs and Features. 

-Right-click Microsoft Office > Change > Quick Repair or Online Repair. 

-Restart your computer. 

 

6.Remove and Re-add Account:  

-Outlook: Go to File > Account Settings > Remove account. Re-add via Add Account. 

-Teams: Sign out from profile picture > Sign back in. 

 

 

If you are using business account, please contact your IT administrator of your organization to check: 

 

1.Confirm the recipient’s correct email: 

-In Microsoft 365 Admin Center  

-Navigating to Users > Active Users 

-Ensure it matches the Teams invite. 

 

2.Check Mailbox Status: 

-In Exchange Admin Center 

-Navigating to Recipients > Mailboxes 

-Ensure that the recipient’s mailbox is active and licensed. 

 

3.Check Mail Flow Rules 

In Exchange Admin Center 

Navigating to Mail Flow > Rules  

-Ensure no rules block emails 

 

4.Check Spam Filters 

-In Microsoft 365 Defender 

-Navigating to Threat Policies > Anti-Spam 

-Check if the invite is quarantined or blocked. 

 

5.In Teams Admin Center, confirm the invite was sent to the correct email 

 

Note: If you’re unsure who the Global Admin is within your organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support.    

 

The first response may not resolve your issue. These steps help me come closer to your situation. 

Once I get the information, I will try my best to find the next steps 

Thank you for your patience while we work through it

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