I am pretty new to Cisco phone systems, so I apologize if I do not have the terminology correct.
When I set up our Cisco voice servers (CUCM, CUPS, CUC) I set them up with an internal DNS namespace (domain.net). Now, I would like to get third-party certificates for all three servers with a different domain name. The server names themselves will not be different, I just want them to have, for instance, GoDaddy certificates for server.domain.com instead of using the self-signed certificates for server.domain.net. The ultimate purpose for this is to use Jabber and the Self-Care Portals without getting certificate warning. In the case of the CUPS server, I will also want to use the domain.com as the main domain. Right now it is using email@example.com when it is looking for internal user to add as contacts and, under Jabber > Options > Privacy, the "Inside my domain" value is domain.net (please see attachment PrivOptoins.jpg).
I know there's a simple command that will change the DNS zone for all of the server and this will also regenerate the self-signed certificates (which I will not be using in a lot of cases anyway). My question is, do I need to do this? Like I said, it seems to be pretty straightforward, but is it unneccessary work?
In all cases, Cisco phones are version 10.5.