HTC Incredible :: Exchange Account Setup - Mail Queued On Server

I got my Incredible on April 29th and setup my Exchange email account and was able to send and receive with no problems. Contacts and calendar synced with no problems. Everything was fine for about a week then I noticed I was no longer receiving emails. I could send with no problems and contacts and calendar still synced ok, I just could not get emails using wither WiFi or Verizon's network. I went into the account settings and activesync settings and see an error message that said "error occurred on the computer running the exchange server". Deleting and recreating the account on the Incredible seems to work, but for only about 7-10 days then right back in the same boat. I do not think the phone is the issue as I had a Droid and had the almost identical problem.

On the Droid I did not see the error message but I would stop receiving emails after about a week. I have tried Touchdown and it's almost the same issue, except that the error is something along the lines of "mail queued on the server". Again, removing and reinstalling the account in Touchdown resolves the issue for about another week. I called our corp help desk folks and it was a wasted phone call. All I got from them was we don't support mobile devices via activesync and wouldn't talk about it anymore, so I am leaning toward something on our mail server causing the issue. My only problem with that answer is that we also have other users here with iPhones and Windows mobile devices and they are not having any problems, and they are also connected via activesync.