Exchange 2007 ActiveSync issues

[safewithyou247]

So, I have searched several forums with no luck so far. I was hoping that someone here could hlep.

First I manage my own exchange server and it is running on Windows 2003 R2 SP2 64bit server. The version of Exchange is 2007 SP1. I just bought a Evo and I have been unable to get it to sync with the Exchange server. When I fill out all the info I get the following error.

Error: Authentication failed. Please verify username and/or password.

I have tried all the obvious things so far. I checked my domain name and I checked my username and password. Also, I have verified that the account syncs on a WM6.5 phone.

This leads me to believe that it is a server side issue or an issue with the build of android.

Anyone that could provide assistance on this would be very helpful.

I will try anything that you recommend. Just let me know.

Thanks!