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?