Restore-ADComputerWithBitlockerInformation.ps1

import-module ActiveDirectory

function RestoreComputer($computername)
{
  If ($computername.substring($computername.length – 1, 1) -ne ‘$’)
  {
    $computername += ‘$’
  }

  $existing = Get-ADObject -Filter {sAMAccountName -eq $computername}
  If (!$existing)
  {
    "No existing computer object found, searching for deleted objects."
    $deleted = Get-ADObject -IncludeDeletedObjects -Filter {sAMAccountName -eq $computername -and Deleted -eq $True}
    If ($deleted)
    {
      "Deleted object found, trying to restore…"
      $deleted | Restore-ADObject
      Start-Sleep -s 5
      $restoredobject = Get-ADObject -Filter {sAMAccountName -eq $computername}
      If ($restoredobject)
      {
        "Computer object successfully restored. Trying to find recovery information…"
        $recoveryinfos = Get-ADObject -IncludeDeletedObjects -Filter {lastKnownParent -eq $restoredobject.DistinguishedName -and Deleted -eq $True -and objectClass -eq ‘msFVE-RecoveryInformation’}
        ForEach($recoveryinfo in $recoveryinfos)
        {
          If ($recoveryinfo)
          {
            "Recovery information found, trying to restore…"
            $recoveryinfo | Restore-ADObject
            Start-Sleep -s 5
            $restoredinfo = Get-ADObject -Filter {ObjectGUID -eq $recoveryinfo.ObjectGUID}
            If ($restoredinfo)
            {
              "Recovery information successfully restored."
            }
            Else
            {
              "Could not restore recovery information, aborting script."
              return $false
            }
          }
          Else
          {
            "No recovery information found for computer object, aborting script."
            return $true
          }
        }
      }
      Else
      {
        "Something went wrong. Could not find restored object, aborting script."
        return $false
      }
    }
    Else
    {
      "No deleted computer found, aborting script"
      return $false;
    }
  }
  Else
  {
    "Computer already existing, aborting script"
    return $false
  }
  "Restore of computer object succeeded."
  "Finished."
  return $true
}

$cn = Read-Host "Computername to restore?"

RestoreComputer($cn)