I have deployed a few Server 2012 installations now and have WSUS running on 2 of them. On a more recent install I paid more attention to the BPA results and saw that WSUS should not be installed on a DC !!!! Previous to 2012 I used to deploy SBS2003 and SBS2008 with WSUS all over the place as standard install - al past the BPA with no problem.
Is this a reality or more positioning on Microsoft's part, similar to 'don't install SQL on a domain controller' - which is really a warning for when the server is supporting a large number of users rather then typical SBS type installations with say 10 users.
Would like to know WSUS on a DC is a real No-no and what happens if you do ??? So should I really uninstall my existing WSUS installations.