powershell remove licenses office 365
$userArray = Get-MsolUser -All | where {$_.isLicensed -eq $true}
for ($i=0; $i -lt $userArray.Count; $i++)
{
Set-MsolUserLicense -UserPrincipalName $userArray[$i].UserPrincipalName -RemoveLicenses $userArray[$i].licenses.accountskuid
}