We have a domain running at Windows Server 2008 Functional Level (single domain in forest).
The domain has 3 DCs. We have about 80 users and maybe 100 workstations total.
The Schema Master, RID, PDC, and Domain Naming Master are running on one DC.
The Infrastructure is running on another DC.
I've read articles (and seen a video on EE) that suggest a single 2012 DC can run all roles. Is this recommended ? Also, is there any disadvantage to not raising the Functional Level to 2008 R2 or even 2012 ?
The main reason I'd like to do this is to consolidate/decommission old hardware and introduce W2012 into our environment.