Get ActiveSync Enabled Accounts/Mailboxes using Powershell

Here is a short/simple script you can use to obtain a list of all mailboxes within your Exchange environment that have the ActiveSync service enabled on them.

#Add Exchange Cmdlets
add-pssnapin *exchange* -erroraction SilentlyContinue

get-casmailbox -resultsize unlimited | where {$_.ActiveSyncEnabled -eq $true}

The output will now be displayed showing all mailboxes in your environment that have ActiveSync functionality enabled on them.

You can export your results to a .csv by adding a bit more to the end of the command as per below. You can of course change the output path as required

get-casmailbox -resultsize unlimited | where {$_.ActiveSyncEnabled -eq $true} | select Name, ActiveSyncEnabled | export-csv "C:\activesyncusers.csv" -notype