Exchange determine the Microsoft Exchange version

Get-ExchangeServer | Format-Table Name, *Version*

Microsoft Exchange 2010

To determine the Rollup that has been applied to Microsoft Exchange 2010, run the following command in the Exchange Management Shell:

GCM exsetup |%{$_.Fileversioninfo}

To determine the Microsoft Exchange version for all Microsoft Exchange Servers in the organisation:

Get-ExchangeServer | Format-Table Name, *Version*