Due to poor planning the site alias needs to be changed. I've now realised that I can't change the site alias in the SQL tables without a lot of pain, and Symantec won't support me. So my next plan is to build a new site and import the users into it. We had a fairly large amount of Vaulted data, about 700gb, so exporting it and re-importing it to the new site isn't really an option due to disk space constraints. Also the users will remain on their existing Excghange servers.
Has anyone done anything similar? I'm waiting for the professional services people to get back to me, but I thought I'd try the forum in the meantime.