First of all, open your Exchange console and run this command: Get-ExchangeServer | Format-List Name, Edition, AdminDisplayVersion As you can see, your version is 14.3 with build level 123.4 Now we can go here to see what means : https://technet.microsoft.com/it-it/library/hh135098(v=exchg.150).aspx In our case, we have one “simple” SP3 . After the update, if you don’t see …