Here’s a quick script for reporting back users their ActiveSync partnerships.
$myusers= Get-CASMailbox -resultsize unlimited -Filter {HasActiveSyncDevicePartnership -eq $true} | select samaccountname,Name $mydevices = foreach($i in $myusers){Get-ActiveSyncDeviceStatistics -Mailbox $i.samaccountname | select-object identity} $mydevices | Export-Csv ActiveSyncDevices.csv