Script Repository

# Get the user's unique identifier in Microsoft 365
try
{
    $objectId = ([Guid]$Context.TargetObject.Get("adm-O365ObjectId")).ToString()
}
catch
{
    $Context.LogMessage("The user doesn't have an account in Microsoft 365", "Warning")
    return
}

try
{
    # Connect to Exchange Online
    $session = $Context.CloudServices.CreateExchangeOnlinePSSession()
    Import-PSSession $session -AllowClobber -DisableNameChecking -CommandName "Get-DistributionGroup", "Get-DistributionGroupMember", "Remove-DistributionGroupMember"
    
    # Get all distribution groups in Microsoft 365
    $groups = Get-DistributionGroup -ResultSize unlimited
    foreach ($group in $groups)
    {
        # Skip a group if the user is not a member
        if (!(Get-DistributionGroupMember $group.Identity | Where{$_.ExternalDirectoryObjectId -eq $objectID}))
        {
            continue
        }
        
        try
        {
            # Remove the user
            Remove-DistributionGroupMember $group.Identity -Member $objectId -Confirm:$False -ErrorAction Stop
        }
        catch
        {
            $Context.LogMessage("Cannot remove the user from group $($group.Identity). Error message: " + $_.Exception.Message, "Warning")
        }
    }
}
finally
{
    # Close the remote session and release resources
    if ($session) { Remove-PSSession $session }
}