Get-UsersGroups

Get-UsersGroups.ps1

Function Get-UsersGroups{
    param (
      $username,
      [switch]$recurse
      )
    #Initialize output variable
    $groups = @()
    #Search AD user and retrieve the groups removing the unwanted characters from the strings.
    ((((get-aduser $username -properties memberof).memberof) | `
        % {$_ -split(",",2)} | `
         select-string -Pattern "CN\=.+" -AllMatches).Matches).Value | `
          ? {$_ -notlike "*,*"} | `
           % {$_ -replace ("CN=","")} | % {
           $groups += New-object psobject -Property @{
            "GroupName" = "$_"
            }

        }
  #if the recurse switch is applied find the groups they are a member of from group nesting.
  if ($recurse){
  Foreach ($item in $groups.GroupName) {
    $subgroups = try {(get-adgroup $item -properties memberof -ErrorAction stop).memberof}
                 catch [Microsoft.ActiveDirectory.Management.ADIdentityNotFoundException] {
                 }
   if ($subgroups -ne $null) {(($subgroups | ? {($_ -notlike "")} | `
        % {$_ -split(",",2)} | `
         select-string -Pattern "CN\=.+" -AllMatches).Matches).Value | `
          ? {$_ -notlike "*,*"} | `
           % {$_ -replace ("CN=","")} | % {
             $groups += New-object psobject -Property @{
              "GroupName" = "$_"
              }
            }
          }

        }
  }
  #Output the groups array
  return $groups
}