Customer has almost 15000 mailboxes they want to migrate to Unity.I have some design questions on this.We can get 15000 mailboxes with 2 or 3 Unity servers with Digital Working. I know For Digital networking all these servers should be in same AD Forest, same Exchg admin group.
Customer also wants redundancy in Exchange and Unity, we can do this with Exchange clustering and Unity failover correct??.
I have more questions on this
1. Can we have just one exchange server (exchange cluster) with one AD domain.
2. Can we install 2 or 3 Unity servers to one exchange server.In other words can we have same partner exchange server for all the unity servers in the network.
Since they want redundancy in exchange and Unity there may be too many servers and I'm just trying to reduce total number of servers they need to maintain.
3. since it is the same AD can we use the same user accounts to install/admin/service for all the Unity servers.
I want the pro's opinion and best practice to give a better solution to the customer.
Thanks in advance for everyone.