After your system administrator has migrated your Exchange system to GroupWise 7, you can begin using the GroupWise 7 Windows client. Refer to the GroupWise 7 Quick Start for basic installation instructions:
If you want to use the GroupWise 7 Cross-Platform client on Linux* or Macintosh* rather than the GroupWise Windows client, you can do so after using the Windows client to import your PST files.