opensuse 11.2 - evolution/mapi - exchange 2007

Hi

I have OpenSuse 11.2 installed from DVD using KDE as my desktop. I installed Evolution 0.28.0-2.5 and then the mapi plug-in 0.28.1-3.1 (1-click install link from opensuse).

We have Exchange 2007 running at work. I am able to connect to my in-box, read emails and send external emails. But I am unable to send internal emails (or reply to internal emails).

Error returned from Exchange server:
The recipient’s e-mail address was not found in the recipient’s e-mail system. Microsoft Exchange will not try to redeliver this message for you.

Diagnostic information for administrators:
<snip> 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

My question please is does the mapi plug-in work with internal emails address and if so, what do I need to do to get it working?

Thanks
Aisling