Hi Kaycee24Unicorn,
Thank you for sharing such information with us. We are highly appreciated your detailed information in our forum community.
Based on your mentioned reply, at once can we re-confirm from your side that which operating system you are using for Teams application? Is it Windows 10 or any other?
If you are using Windows 10 or if you can see this signed in email account under Windows 10 Settings > Accounts > Access work or school option, please select that signed in account and click on “Disconnect” account. It will not manage your email account on that device.
After that, sign in again on Teams application.
We hope above information will work for you.
Regards,
Darpan