Public/Test-IsLocalGroupMember.ps1
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function global:Test-IsLocalGroupMember { <# .EXTERNALHELP HelperFunctions.psm1-Help.xml #> [CmdletBinding()] [OutputType([boolean])] param ( [Parameter(Mandatory = $true, Position = 0, HelpMessage = 'Enter the name of the user account to check group membership against.')] [Alias('UserName')] [String]$User, [Parameter(Mandatory = $true, Position = 1, HelpMessage = 'Enter the name(s) of the built-in groups to test.')] [String]$GroupName ) begin { $objGroup = [ADSI]"WinNT://./$GroupName,group" $objMembers = @($objGroup.Psbase.Invoke("Members")) } process { $Members = ($objMembers | ForEach-Object { $_.GetType().InvokeMember("Name", 'GetProperty', $null, $_, $null) }) } end { if ($Members -contains $user) { return [bool]$true } else { return [bool]$false } } } #end function Test-IsLocalGroupMember |