tests/Test-TeamsExternalAccess.ps1
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function Test-TeamsExternalAccess { [CmdletBinding()] param ( # Parameters can be defined here if needed ) begin { # Dot source the class script $auditResults = @() } process { # 8.2.1 (L1) Ensure 'external access' is restricted in the Teams admin center # Connect to Teams PowerShell using Connect-MicrosoftTeams $externalAccessConfig = Get-CsTenantFederationConfiguration $allowedDomainsLimited = $false if ($externalAccessConfig.AllowFederatedUsers -and $externalAccessConfig.AllowedDomains -and $externalAccessConfig.AllowedDomains.AllowedDomain.Count -gt 0) { $allowedDomainsLimited = $true } # Check if the configurations are as recommended $isCompliant = -not $externalAccessConfig.AllowTeamsConsumer -and -not $externalAccessConfig.AllowPublicUsers -and (-not $externalAccessConfig.AllowFederatedUsers -or $allowedDomainsLimited) # Create an instance of CISAuditResult and populate it $auditResult = [CISAuditResult]::new() $auditResult.CISControlVer = "v8" $auditResult.CISControl = "0.0" # The control is Explicitly Not Mapped as per the image provided $auditResult.CISDescription = "Explicitly Not Mapped" $auditResult.Rec = "8.2.1" $auditResult.ELevel = "E3" $auditResult.ProfileLevel = "L2" $auditResult.IG1 = $false # Set based on the CIS Controls image $auditResult.IG2 = $false # Set based on the CIS Controls image $auditResult.IG3 = $false # Set based on the CIS Controls image $auditResult.RecDescription = "Ensure 'external access' is restricted in the Teams admin center" $auditResult.Result = $isCompliant $auditResult.Details = "AllowTeamsConsumer: $($externalAccessConfig.AllowTeamsConsumer); AllowPublicUsers: $($externalAccessConfig.AllowPublicUsers); AllowFederatedUsers: $($externalAccessConfig.AllowFederatedUsers); AllowedDomains limited: $allowedDomainsLimited" $auditResult.FailureReason = if (-not $isCompliant) { "One or more external access configurations are not compliant." } else { "N/A" } $auditResult.Status = if ($isCompliant) { "Pass" } else { "Fail" } $auditResults += $auditResult } end { # Return auditResults return $auditResults } } |