We are installing two Unity clusters to support two Dialing domains. We also need to integrate these clusters to other Voice Mail systems using VPIM. I need some directions on the VPIM setup:
1. How many voice connectors do I need. I think I just need one to support any number of clusters as long as they are digitally networked.
2. How many Transport event sinks do I need. Some document specify that I need one event sink per dialing domain but I am not sure if this is true and why do I need two.
3. Also we need single logon. Do I need multiple (one/dialing domain) front end unity servers to support that.