I have a DC and Exchange in site A, and just a DC in site B. The VPN has gone down between sites due to an internet issue.
After this happened a Terminal Server in Site A and a PC in site A could not connect to Exchange. I tried everything I could think of. I then added a reg entry to force them to use the local Global Catalogue. This resolved the problem but I can't figure out why they were trying to communicate with the other GC. Everything in AD Sites and Services looks ok.
I assume there is still an issue that needs to be fixed.
Would appreciate any ideas?