o365 users last login reports

$Result=@() 

$mailboxes = Get-Mailbox -ResultSize Unlimited

$totalmbx = $mailboxes.Count

$i = 1 

$mailboxes | ForEach-Object {

$i++

$mbx = $_

$mbs = Get-MailboxStatistics -Identity $mbx.UserPrincipalName | Select LastLogonTime

if ($mbs.LastLogonTime -eq $null){

$lt = "Never Logged In"

}else{

$lt = $mbs.LastLogonTime }

Write-Progress -activity "Processing $mbx" -status "$i out of $totalmbx completed"

$Result += New-Object PSObject -property @{ 

Name = $mbx.DisplayName

UserPrincipalName = $mbx.UserPrincipalName

LastLogonTime = $lt }

}

$Result | Export-CSV "C:\O365-LastLogon-Info.csv" -NoTypeInformation -Encoding UTF8