Some things never make sense to me, and one of them is the way one finds out the build number of Exchange that is installed on a server – the method is different depending on which version is installed!
First, here is the link to a list of all the build numbers for the various versions of Exchange:
Exchange Server and Update Rollups Build Numbers
I’m running SBS 2011 Standard in my office, with Exchange 2010 SP2, and I’m preparing to install Update Rollup 4-v2 for Exchange 2010 SP2. I will presume that you have a recent backup of your server!
Step 1: Let’s find out what version of Exchange 2010 I am running.
You do this by opening up the Exchange Management Shell, and then entering this command:
GCM exsetup |%{$_.Fileversioninfo}
Here’s the result on my server:
Step 2: Install UR4-v2 from the SBS/WSUS console
Step 3: Reboot your server and confirm version of Exchange
Surprisingly, the UR4-v2 did not require a reboot of the server, but I certainly would suggest doing so!
Finally, open up Services (services.msc) and do a quick check and verify that all the Exchange-related services that have a startup type-Automatic are indeed running.