PowerShell script to enable litigation hold for all user mai

# First you need to be connected to the Exchange PowerShell.

$pagesize = 100; # The number of mailboxes per loop
$inc = 0; # Start increment value

# Continue until all mailboxes are litigation hold enabled
do {
    Write-Output "Getting mailboxes"
    # Get UserMailboxes that does not have litigation hold enabled
    $mailboxes = Get-Mailbox -Filter {LitigationHoldEnabled -eq $false -and RecipientTypeDetails -eq "UserMailbox"} -ResultSize $pagesize -WarningAction SilentlyContinue
    if($mailboxes) { Write-Output ("Current mailbox count: {0}" -f ($inc += $mailboxes.Count))}
    # Enable litigation hold
    $mailboxes | Set-Mailbox -LitigationHoldEnabled $true -WarningAction SilentlyContinue
} while($mailboxes);

Write-Output "Done"