Dear Tony Pitman,
Welcome to Microsoft Q&A.
Thank you for sharing the details and screenshot. Based on your description, the phantom notification badge appears when your business account is active, but the unread indicator seems tied to your personal account. You also mentioned seeing two unfamiliar organizations under your personal account, which could be related.
To better understand and resolve this, could you clarify a few points:
What Teams app version are you currently using?
Does the badge always show the same number, or does it change?
What steps have you already taken to resolve this issue?
In the meantime, here are some steps you can ty:
In Teams Desktop app or web, please refer on this article Leave a work or school organization in-microsoft teams free
Check Chat and Meeting Chats for unread items and use Mark all as read.
If the badge persists, clear app data or reinstall Teams to refresh cached notifications.
About the guest organizations
Those invites mean you were added as a guest in other Microsoft 365 tenants. If you no longer need access, you can leave them:
Go to My Account > Organizations > select the org and click Leave.
For personal Microsoft accounts, you may need to use a tenant-specific link:
https://myaccount.microsoft.com?tenantId=<tenant>.onmicrosoft.com
If you cannot leave because of MFA or the guest account is disabled, contact the admin of that organization to remove you.
Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.
I hope this information helps point you in the right direction. If you run into any issues while trying the steps, or if something still doesn’t feel quite right, please don’t hesitate to reach out again. I’ll do my best to support you however I can.
Looking forward to hearing back from you with any updates or additional details.
Warm regards,
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