When you use Novell Vibe with GroupWise, some configuration steps are required to integrate the applications, as described in Configuring GroupWise for Use with Novell Vibe in the GroupWise 8 Interoperability Guide:
Configuring GroupWise for Use with Novell Vibe
Using GroupWise as the Vibe E-Mail System
Enabling GroupWise/Vibe Integration for GroupWise Windows Client Users
Accessing Your Vibe Site from the GroupWise Client