Symptoms

How difficult is it to change the server address? I originally set K2 up using the server hostname "K2Server" but am now having trouble with the SSL cert being trusted because it's using an AD cert which isn't trusted by Firefox or Chrome (IE works properly). I'm considering using a different DNS name "k2.denallix.com" so that I can apply my domain wildcard certificate which would make the site trusted in all browsers.
 

Diagnoses

We did several things as far as changing the server name. What we wished to configure here was a host name separate from the machine name.
 

Resolution

DNS entry was already provisioned pointing to the IP address of the server.

We configured bindings and set the hostname appropriatley in IIS for K2 sites, we had to rename the certificate so that it's 'friendly name' was *.denallix.com to enable the hostname setting in IIS.
We then updated environment library variables to reflect the new hostname.
We updated the realm configuration in the web.config for designer and runtime.
We also updated the claims configuration to point to sites using the new hostname.
Finally, we added the new hostname to trusted sites, as we had some strange display issues with workspace without the compatibility settings in place.