I have worked with Unity since the 2.46 days and am very comfortable with it.
I have two Unity VM Only both with off box meddage store. If want to do Digital Networking. Do I need to keep the Uity's and Message stores in the same domam. Do I Duild two DC master and slave then cluster the two the Message Store or do I build one DC and GC and just add everything else to the DC as member servers and point the Unitys to there local partner.
My design is Unity--->Message Store at each Data Center with a WAN Link between them. No fail over