I read this post:
How to stop Outlook 2007 asking for credentials when using RPC over HTTPS
However, we don't have control over the back end server. This is controlled by a third party we are using for hosted exchange. They informed me that they have configured the server to require a user's credentials (password) every time the local Outlook client is opened. They also informed me there is no workaround, but I find it hard to believe I can't configure our own XP machines to remember a password, even if it means additional software.
Is this really the situation, or is there a workaround they aren't telling me about?
Best Answer
Outlook will transparently authenticate to Exchange if logged-on with a credential in the same (or a trusted) domain as the Exchange Server computer is located.
You don't have that, so you're getting prompted for credentials.
One "workaround" would be to have your client computers joined to the domain where Exchange is being hosted. I seriously doubt your provider would do such a thing.
There's some talk in an article that I'm seeing that indicates that there may be a way to do this using the password caching functionality in Windows: http://www.andreasroom.com/blog/archive/2005/06/17/RPCHTTP.aspx I've never tried this before and I'm a little dubious that it would work. It's worth a shot, though, I suppose.