just migrated to 2007, which i may add has tested the very fabric of my being, lol. But an issue i am having is at 1 location i have users that mail gets stuck into the outbox and doesn't send. i can beat on it an get it to eventually send, but this is only happening at 1 location. i have 6 other locations throughout the US that aren't having this issue. I've never had an issue where it successfully authenticates with AD and exchange server and mail don't send. They can recieve just fine. Any help on where to being troubleshooting would be great

This sounds like it may have something to do with the Hub Transport server - If the MBX server cannot find a Hub transport server in its site then email will not leave the outbox in outlook or be stuck in the drafts from outlook web access.

Hub Transport Role is installed on the same exchange server. This issue is not affecting anyone else except the one location