Hello ThomasPMoore,

Thank you for sharing such information with us. We will highly appreciate your kind cooperation and patience in our forum community.

• Based on your mentioned description, at initial stage could you please provide us detailed steps screenshot with error message to understand particular situation?

-First try to sign into your Microsoft teams online version to check if you are facing the issue as well. https://teams.microsoft.com 

• May I please know what operating system you are using Windows 10 / Windows 11 / any other?

1. I assumes that you are using Teams application on Windows 10, at once please kindly re-set Teams application via clearing Teams cache and try to see if it gives any kind of result or not.

• Fully close Microsoft Teams
• Press Windows + R keys > type %appdata%\Microsoft and click OK
• Find the Teams folder, then right click it and select Delete.
• Relaunch Microsoft Teams.

2. On the other hand, if you have added Work email account under Windows Settings option, please kindly try to remove and add again.

• Exit the MS Team app. (Right-click the team icon at the taskbar > select quit).
• Go to Windows settings (Press Windows key + I) > Accounts
• Select "Access Work and School" > Select old work account > Click Disconnect
• Sign out and Sign in again, after that see the result scenario or situation.

3. Please kindly clear Teams credentials from the Credential Manager to check the result.

• Click Windows Start > Control Panel > User Accounts > Credential Manager.

Note: if View by is set to Category, click user accounts first, and then click Credential Manager.

• Select the Windows Credentials option. Locate the set of credentials that has either Microsoft Teams in the name and then expand the corresponding folder.
• Click Remove from Vault (depending on which version of Windows you are running).

Meanwhile, if I misunderstood anything wrong, please kindly feel free to correct us. Please feel free to provide us some brief screenshot information and above requested information or affected email address in this private message for privacy and to understand particular scenario or situation.

Below are the steps to open private message:    To View private messages option > click on Profile Picture at top of the right side > Select My Profile option.

We look forward to your response. This requested information will help us to narrow down the scenario and find the right troubleshooting. We will keep assist you based on the information you will provide. I sincerely appreciate your patience and cooperation.   Sincerely,Eben MSFT | Microsoft Community Moderator