# Copy group members to another group
$Source_Group = "CN=srcGroup,OU=Groups,DC=domain,DC=local,DC=net" 
$Destination_Group = "CN=dstGroup,OU=Groups,DC=domain,DC=local,DC=net" 
 
# Add -Recursive to end of this line to flatten the group 
$Target = Get-ADGroupMember -Identity $Source_Group 
foreach ($Person in $Target) { 
    Add-ADGroupMember -Identity $Destination_Group -Members $Person.distinguishedname 
}
 
 
# Gets time stamps for all computers in the domain that have NOT logged in since after specified date 
# Mod by Tilo 2013-08-27 
import-module activedirectory  
$domain = "domain.mydom.com"  
$DaysInactive = 90  
$time = (Get-Date).Adddays(-($DaysInactive)) 
 
# Get all AD computers with lastLogonTimestamp less than our time 
Get-ADComputer -Filter {LastLogonTimeStamp -lt $time} -Properties LastLogonTimeStamp | 
 
# Output hostname and lastLogonTimestamp into CSV 
select-object Name,@{Name="Stamp"; Expression={[DateTime]::FromFileTime($_.lastLogonTimestamp)}} | export-csv OLD_Computer.csv -notypeinformation
 
 
# Disabled a list of users
Import-Module activedirectory
$list = Import-CSV c:\scripts\disableusers.csv
forEach ($item in $list) {
   $samAccountName = $item.samAccountName
   Disable-ADAccount -Identity $samAccountName
}
 
# Demote a server
Import-Module ADDSDeployment
Uninstall-ADDSDomainController `
-DemoteOperationMasterRole:$true `
-Force:$true

Import-Module ActiveDirectory
 
function Get-ADUsersLastLogon()
{
  $dcs = Get-ADDomainController -Filter {Name -like "*"}
  $users = Get-ADUser -Filter *
  $time = 0
  $exportFilePath = "c:\lastLogon.csv"
  $columns = "name,username,datetime"
 
  Out-File -filepath $exportFilePath -force -InputObject $columns
 
  foreach($user in $users)
  {
    foreach($dc in $dcs)
    { 
      $hostname = $dc.HostName
      $currentUser = Get-ADUser $user.SamAccountName | Get-ADObject -Server $hostname -Properties lastLogon
 
      if($currentUser.LastLogon -gt $time) 
      {
        $time = $currentUser.LastLogon
      }
    }
 
    $dt = [DateTime]::FromFileTime($time)
    $row = $user.Name+","+$user.SamAccountName+","+$dt
 
    Out-File -filepath $exportFilePath -append -noclobber -InputObject $row
 
    $time = 0
  }
}
 
Get-ADUsersLastLogon

  # Allow scripts to be ran
  Set-ExecutionPolicy RemoteSigned