Today I received a strange error when connecting to Teams PowerShell. I am noting it here briefly because after 15 seconds of searching the web I did not find a solution 😇. Everything I found initially had nothing to do with Teams.
I simply wanted to connect to the Microsoft Teams administration with PowerShell using Connect-MicrosoftTeams. Without specifying any additional parameters, just log in normally with a personalized admin account and then confirm MFA and so on. But before I was even asked for a username, everything was red.
The error message:
Connect-MicrosoftTeams : One or more errors occurred. In line:1 character:1
- Connect-MicrosoftTeams
- CategoryInfo : AuthenticationError: (:) [Connect-MicrosoftTeams], AggregateException
- FullyQualifiedErrorId : Connect-MicrosoftTeams,Microsoft.TeamsCmdlets.Powershell.Connect.ConnectMicrosoftTeams
Connect-MicrosoftTeams : The ActiveX control 8856f961-340a-11d0-a96b-00c04fd705a2 cannot be instantiated because the current thread is not a single-threaded apartment. In line:1 character:1
- Connect-MicrosoftTeams
- CategoryInfo : AuthenticationError: (:) [Connect-MicrosoftTeams], ThreadStateException
- FullyQualifiedErrorId : Connect-MicrosoftTeams,Microsoft.TeamsCmdlets.Powershell.Connect.ConnectMicrosoftTeams
Connect-MicrosoftTeams : Object reference not set to an instance of an object. In line:1 character:1
- Connect-MicrosoftTeams
- CategoryInfo : NotSpecified: (:) [Connect-MicrosoftTeams], NullReferenceException
- FullyQualifiedErrorId : System.NullReferenceException,Microsoft.TeamsCmdlets.Powershell.Connect.ConnectMicrosoftTeams
Version of the Teams PowerShell module
I first suspected that I was using an outdated module version, but the error also occurred with version 4.4.1 (the latest version while I was writing this post).
Workaround
I have not investigated the exact cause. Apparently, however, an old authentication was still cached. I ran Disconnect-MicrosoftTeams once and then I was able to log in normally again with Connect-MicrosoftTeams.