How to change internet name of 2008 Server and renew SSl certificate without causing a problem.

Hi All,

This will probably sound more complicated than it actually is but need a bit of advise on a clients 2008 Server.  

This was the first 2008 server I ever set up and I kind of fudged it truth be known and didn't know then about the need for UCC certificates to handle autodiscover e.t.c. but somehow whatever I did worked and clients were not troubled with the username and password prompts when firing up Outlook so everyone has been happy.  However their original godaddy single domain SSL certificate I set up has now expired and I now realise I need to bite the bullet and tidy up everything on the server and do this whole thing properly.  Now my issue is this:

When I set up the server I didn't know what was required when the setup wizard asked for an internet name so I bought a new domain name called examplemail.com then created a subdomain called remote.examplemail.com and used that as the internet name of the server.  I then got and installed a single SSL certificate for remote.examplemail.com and eveything has been fine (OWA is secure e.t.c.) HOWEVER, the internal domain was set to "exampledomain.local" and the external email (i.e. the users proper email address domain) is "anotherexampledomain.co.uk"  Now I know this is messy but that's why I want to straigten it all out.

The orginal SSL certificate has now expired and users are getting expired cert errors when they open Outlook.  What I would like to know are what steps do I need to take to tidy things up first, then request a UCC certificate covering OWA, Autodiscover e.t.c. as at the moment I don't know what the SAN names should be for the certificate or anything!

Thanks in advance

Adam