>I haven't tried using the Exchange client under 98, but we have installed the Outlook client to talk to our Exchange Server succesfully under 98. Have they tried that, and would that be an acceptable solution until MS can give a better answer?

Hi Ed - Afraid I've been out for surgery, just getting back to keyboard now. I discovered the root of the problem. There's a default setting in Win98 Outlook Express (Tools/Options) that has it selected as the default email app, as well as Simple MAPI app. De-selecting these allows the Exchange setup to complete.

I did try installing Outlook client, but it had the same problem. Now that I know what the culprit is, it should also work...we'll be moving to that this summer, in fact...