$result_file = New-Item -ItemType file -Path result.txt -Force
Add-Content -Path $result_file -Value "Identity,DeviceType,FirstSyncTime,LastSuccessSync"
Get-CASMailbox -ResultSize unlimited | Where-Object { $_.ActiveSyncEnabled -eq "true" -and  $_.HasActiveSyncDevicePartnership -eq "true" } | Foreach {
#Write-Host $_.identity
$stats = Get-ActiveSyncDeviceStatistics -Mailbox $_.identity
Add-Content -Path $result_file -Value "$($_.Name),$($stats.Identity),$($stats.DeviceType),$($stats.FirstSyncTime),$($stats.LastSuccessSync)"
}