We are migrating to a new domain and new Exchange server. Our PCs are built from a customized Office installation that forces Outlook to connect directly to a specific Exchange server. We are trying to connect users to a different, new Exchange server.
We have tried creating an Outlook .prf file that points the user to the new server, but this doesn't work. It always defaults back to the original server.
We've compiled a new MSP file which points to the new server, and this works perfectly for new users, but does not over-write existing users. If we delete the existing user's Windows profile and have them login and recreate the profile when they open Outlook it uses the new MSP file and connects to the new server.
In the original profile we have also tried deleting the Outlook profiles and re-creating from scratch. They always are forced to the old server.
The old server is Exchange 2003 and has no autodiscover records configured and we have done all the testing we could to rule out DNS issues. It is definitely coming from the Office install / customization.
Anyone know how to force-overwrite this? We have a case opened with Microsoft and we are awaiting a response but I was hoping someone on here may have some ideas.