Can't Run Skype Commands when authenticating programatically on Powershell - powershell

Question

I am running into an strange issue building a Powershell script. I want to programatically connecto to Microsoft Teams and execute some skype for businesss online commands.
When I simply do on a terminal
Connect-MicrosoftTeam and get prompted and import my credentials, it all works perfectly, but i need to this programatically.
I did an app registration with the following permissions
And I am authenticating against Azure AD and Graph:
#Connect to Graph
$Body = #{
Grant_Type = "client_credentials"
Scope = "https://graph.microsoft.com/.default"
client_Id = $ApplicationID
Client_Secret = $AccessSecret
}
$ConnectGraph = Invoke-RestMethod -Uri "https://login.microsoftonline.com/$TenatDomainName/oauth2/v2.0/token" -Method POST -Body $Body
$token = $ConnectGraph.access_token
#Connect to AD
$uri = "https://login.microsoftonline.com/${tenant_id}/oauth2/token"
$body = #{grant_type='refresh_token';resource='https://graph.windows.net';client_id=$clientId;refresh_token=$refresh_token}
$result = Invoke-RestMethod -Method Post -Uri $uri -Body $body
$accessToken = $result.access_token
Then I run
Connect-MicrosoftTeams -AadAccessToken $accessToken -MsAccessToken $token -AccountId $account
And it doesn't throw an error, works properly. and i gen run commands like Get-Team and returns the info correctly. However when I try to run an skype command like
Get-CsOnlineVoiceUser
I get the error
Get-CsOnlineSession : Run Connect-MicrosoftTeams before running cmdlets.
At C:\Program Files\WindowsPowerShell\Modules\MicrosoftTeams\2.3.1\net472\SfBORemotePowershellModule.psm1:63 char:22
+ $remoteSession = & (Get-CsOnlineSessionCommand)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Get-CsOnlineSession], UnauthorizedAccessException
+ FullyQualifiedErrorId : UnauthorizedAccessException,Microsoft.Teams.ConfigApi.Cmdlets.GetCsOnlineSession
Invoke-Command : Cannot validate argument on parameter 'Session'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again.
At C:\Program Files\WindowsPowerShell\Modules\MicrosoftTeams\2.3.1\net472\SfBORemotePowershellModule.psm1:10006 char:38
+ ... -Session (Get-PSImplicitRemotingSession -CommandName 'Get-CsOnline ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Invoke-Command], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.PowerShell.Commands.InvokeCommandCommand
Am I missing something? I am using the 2.3.1 Teams Module.
Thanks!

Answer 1

This is a bit tricky to do, but can be achieved.
I recommend reading this blog post for exact instructions and code examples:
https://paulobrien.co.nz/2020/06/29/s4b-online-powershell-modern-auth/
Should get you started.