I'm not sure if NT is similar to Win98 in reaction to this, but we discovered that Outlook and Groupwise don't get along. The same thing you experienced happened to us when Outlook was enabled AFTER Groupwise was installed. The following has worked for us(usually!):
·Uninstall Outlook Express using the Add/Remove function of the Control Panel.
·Uninstall Microsoft Outlook using the Add/Remove Components function of the Microsoft Office setup.
·Reinstall GroupWise. GroupWise will complain that parts of the Windows Messaging System are missing. Allow GroupWise to clean up Windows Messaging. The system will be rebooted between that and the actual GroupWise install, so don’t remove the CD at the reboot.
·In Control Panel/Mail select Show Profiles and select Novell Default Settings from the drop down menu.
Restart the computer and everything should be fine with GroupWise.
Good luck, JG