@wewa00 Hello, I'm taking a wild guess that your personal PC is "Azure AD registered" with your organization, and Teams always defaults to your domain account. You can manually disconnect the device from Settings > Accounts > Access work or school > select the tenant > Disconnect. Bear in mind this will remove the device from Azure AD so if you're using the personal device accessing that org. you will need to reconnect and have it registered again. Now you can try the procedure you previously performed.