We have some users who work remotely and they access their e-mail in Outlook 2003 using RPC over HTTP. We just hired another sales guy and the laptop we bought for him came with Office 2010, so I decided to give it a whirl. I set it up the same as I normally would for Outlook 2003 and sent him on his merry way. Now he's back home several thousand miles away and can't get to his e-mail. He is able to access his e-mail using Outlook Web Access.
Searching around on Google, lots of people were pointing to https://testexchangeconnectivity.com/ so I gave that a try. Most of the steps are successful, but it fails on "Attempting to ping RPC endpoint 6001 (Exchange Information Store)". I'd like to fix this, though I suspect fixing it may not automatically fix the outlook 2010 issue.
I checked the registry setting for ValidPorts, and it's configured correctly. I have ports 80, 443, and 6001-6004 being forwarded on the router to the Exchange server.
If Outlook 2010 just won't work with Exchange 2003, I can accept that, though trying to rectify it will be interesting because I don't expect this guy will be back in the office for a long time. Has anybody got Outlook 2010 working with Exchange 2003 using RPC over HTTP?
If you have a solution, or something you want me to do to help investigate the problem, please give specific steps. Exchange Server is slightly outside my area of expertise.