Teams Remove Old Accounts From Signin

Logout of Teams and quit from the System tray, check task manager to make sure there is no ms-teams.exe process running

Delete the following folders

                        
                            %LocalAppData%\Microsoft\OneAuth\accounts
                        
                            %LocalAppData%\Packages\MSTeams_8wekyb3d8bbwe
                            %LocalAppData%\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy
                            %LocalAppData%\Microsoft\OneAuth
                            %LocalAppData%\Microsoft\TokenBroker
                            %LocalAppData%\Microsoft\IdentityCache