2 CAS servers using Windows Network Load Balancing.
2 MBX/HT servers with a DAG setup.
My issue is when I want to take one of the CAS servers offline. If I go into NLB and stop the host then any client that was connected to that host will lose connectivity in outlook and owa. The lost connection can be up to a minute long, which is unacceptable. I maintain a ping of the nlb cluster ip when I stop a host.
Before anyone asks. Yes, I have my CAS Array setup with both CAS servers as members. Yes, I have my DNS A record configured correctly.