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Powershell : List all External users which have access to your Teams

"Peut-on savoir si des externes ont accès aux sites Teams ? Et si oui lesquels ?" est une question qui revient souvent quand on parle droits d'accès et O365.

Pour le savoir rien de plus simple, Powershell et de la patience.

 

#Connect-MicrosoftTeams
Connect-MicrosoftTeams

# Define Variables
$ArrayTeamsMembers = @()
$AllTeams = Get-Team

$AllTeams | foreach {
    $GroupId = $_.GroupId
    $DisplayName = $_.DisplayName
    $Visibility = $_.Visibility
    $Archived = $_.Archived
    $MailNickName = $_.MailNickName
    $Description = $_.Description

    # Search External members
    $Members = Get-TeamUser -GroupId $GroupId 
    $External = $Members.where({$_.Role -eq "Guest"})

    If ($External.count -ne 0) {
        Write-Host "External User(s) are present in $DisplayName" -ForegroundColor Green
        $External.count
        $External | foreach {
            $UserId = $_.UserId
            $User = $_.User

            $ArrayTeamsMembers += New-Object psobject -Property @{
                GroupId = $GroupId
                DisplayName = $DisplayName
                Visibility = $Visibility
                Archived = $Archived
                MailNickName = $MailNickName
                Description = $Description
                UserId = $UserId
                User = $User
                }
            $UserId = $null
            $User = $null
            }
        }

    $GroupId = $null
    $DisplayName = $null
    $Visibility = $null
    $Archived = $null
    $MailNickName = $null
    $Description = $null
    $Members = $null
    $External = $null
    }

$ArrayTeamsMembers | Export-Csv c:\temp\ExternalTeamsMembers.csv -Encoding UTF8 -Delimiter ";" -NoTypeInformation

 

 

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