I need some assistance with a design for unity 8.
Basically the customer currently has unity 4.0 integrated with their exch 2k3 server, wind 2k3 and cucm 7.1.
The customer purchased four 7835 servers and would like to have four unity servers located over 2 sites, 2 servers in main site and the other 2 in a sub site. The subscribers are totally 1500.
What do you think is the best design for this environment.
Intially I was thinking to have a primary and secondary server at the main site with two secondary servers at the sub site similar to how their cucm servers are configured however from looking at cisco recommendations firewalls between servers is not recommended and also only purchased 2 failover licenses.