Brief overview of our Exchange config.
1 X Exchange 2010 Mailbox server(physical)
2 x Exchange CAS (on different Virtual machines) for OWA and Outlook clients
Now onto the question at hand.
We recently upgraded our Phone System NEC Sphericall v7.0.2, which has support for Exchange 2010. However, when we commissioned Sphericall to use Exchange 2010 and Voice mail server, it had some errors. We contacted Sphericall TAC and they mentioned that a CAS role needs to be on the Exchange server in order for the Phone system to send voice mail to the exchange server. Both the exchange server and phone system are in same physical location and subnet.
Question is, Will adding the CAS role on the Exchange Mailbox Server cause and issue with the 2 existing CAS servers communicating with the Mailbox server?