I was wondering if you could advise me. I am doing a migration from Cisco Unity 4.0.4 to 7.0.2.
We are currently running Unity 4.0.4 in a unified messaging scenario. Unity 4 is based in a datacentre in Angel, London , which is where the current email servers are (Exchange 2003 servers).
My new Unity 7.0.2 server will be sitting in a resource domain called ERME, geographically based in our local datacentre in Canary Wharf , London . Our Exchange 2007 servers with the mailboxes will sit in the ERRF domain (within the same forest, two-way trusts setup already), but based over the WAN in two separate datacentres( East London & West London).
According to the Cisco Unity 5.x design guide it states, The Unity server needs to be on the same network as the “partner” Exchange server, and uses MAPI over RPC to connect to Exchange. The network response time for MAPI calls from Unity to Exchange partner server should be less than 10ms.
My question is as follows. My Exchange 2007 servers are based in two datacentres, East London, West London . If I install just a partner Exchange 2007 server with the mailbox server role (but hosting no actual user mailboxes) in Canary Wharf datacentre which is part of the same Exchange Server’s group (E.London & W.London), will the 10ms rule be adhered to? Would the local Unity 7.x box talk directly to only the local Exchange Server which is its partner, or would it require a 10ms response to the rest of the Exchange servers in the E & W London datacentre?
Sorry to bother you, but I could not find any definitive documentation on this.