Better late then never?
Groupwise will always use the Novell Default Settings profile and Outlook with TRY to use the Novell settings by default. By creating a new profile (Assuming Outlook is being installed after GW) and forcing Outlook to ask which profile to be used, it works.
In order for Outlook to play nicely with Groupwise, you simply have to set up a profile for Outlook in the "Mail" options of the Control Panel and check the box that says something the effect of "Prompt for profile to use".
It's a minor inconvenience, but when Outlook starts you have to choose the profile you've created for it (Or the existing profile it's been using if it was installed before GW).
After you've created the profile and start Outlook, it will ask you if you'd like it to fix a "problem" it's found with the messaging. Be sure to tell it "No" or you'll be reinstalling your GW client.
Hope this helps.