I just recently moved departments and inherited an AD setup that was not setup the best. What I found today was that the primary DC looks to be set up just fine with all FSMO roles, DFS and SQL. On the secondary DC, the person installed AD, but did not install DNS. I thought something was wrong when I went to connect to the secondary DC from the first's ADUC and it didn't show up.
So, now my questions is this: Can I simply add the role of DNS on the secondary server? If so, how do I do this so that I ensure it is AD integrated. Once all of that is done and replication works in ADUC (which it does not now), I'll then point the Secondary DC to itself for primary DNS and to the primary DC for secondary DNS, or should I reverse that? If so, should I do that on the primary: point to itself first and the secondary second for DNS? I know there are many Microsoft articles that say it does not matter or contradict each other.
These servers are Server 2008 service pack 2.