>>>>This is due to an entry missing from the registry. In my MAPI Class zip file you will find a file called fox.reg - this is the required license. It's actually a development license for MAPI. This will get rid of that message.
>>>
>>>Thanks...I also found two bug docs on it. Why it has not shown until this one user is really what's weird. Other MS suggested fixes are:
>>
>>If the bug docs you found are the same ones I found when dealing with this a few weeks ago, they are no help. I had reservations about installing a design-time license on an end-users machine, but in the end, this is what I had to do. Fox.reg is also downloadable by itself from the files section.
>>
>>>1) use REGSRV32 for the OCX
>>
>>This does not work.
>
>You are quite right, I will attest to it. The OCX is, in fact, completely registered, I have checked and double-checked. I will try the fox.reg idea. Why on earth would this be a problem on only one machine out of dozens, though? I don't get it...

I think that I narrowed it down to the exact version of Outlook that was installed. I didn't know this before, but apparently, you can download a free FULL version of outlook from the MS site, and the machines that were using this copy (not installed from the Office CD) had the problem.