During our test run at installing Microsoft Exchange 2013 Standard on our newly minted Windows Server 2012 Essentials domain we hit a weird error that turned out to be a PEBKAC (me) issue.
When one does a search for Exchange 2013 Prerequisites a number of different sites come up that deal with installing Exchange 2013. However, most, if not all have Exchange 2013 Preview and or Preview components linked in their posts.
The above snip is from the Microsoft Download site. Note the top one. Most of the blog posts link to the (Preview) download! :P
So, about half an hour after exercising our ability to discover the definition of insanity (doing the same thing over and over all the while expecting a different result) We discovered that the download was different via a Microsoft link (not sure which one).
Another clue that should have rattled the brain cells at this late hour in the day was not the following:
It was actually the fact that all of the Unified Communications Managed API 4.0 Runtime (Preview) was in that list!
Oh, and by the way, the Exchange 2013 setup routine will do the necessary AD preparation:
So, please make sure to have a System State Backup in place before running the Exchange 2013 Setup Routine!
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book