Update Get-MobileDeviceStatistics.md

Updates to Example 2 per Issue #2239

Author: chrisda

exchange/exchange-ps/exchange/devices/Get-MobileDeviceStatistics.md

@@ -59,7 +59,7 @@ This example retrieves the statistics for the mobile phone configured to synchro
 
 ### -------------------------- Example 2 --------------------------
 ```
-$UserList = Get-CASMailbox -Filter {HasActiveSyncDevicePartnership -eq $true -and -not DisplayName -like "CAS_{*"} | Get-Mailbox; $UserList | foreach {Get-MobileDeviceStatistics -Mailbox $_}
+$UserList = Get-CASMailbox -Filter {HasActiveSyncDevicePartnership -eq $true -and -not DisplayName -like "CAS_{*"} | Get-Mailbox; $UserList | foreach {Get-MobileDeviceStatistics -Mailbox $_.Identity}
 ```
 
 This example uses the Get-CASMailbox cmdlet to determine who in the organization has an Exchange ActiveSync mobile device. For each mobile device, the Exchange ActiveSync device statistics are retrieved.