You can also try Stellar Converter for GroupWise which is highly recommended by professionals. Using this tool, you can convert multiple GroupWise mailboxes into Outlook PST format as well as export GroupWise archive data into Outlook. The tool supports all version of Microsoft Windows and Outlook and Supports GroupWise 2018, 2014, 2012, 8.0, 7.0, 6.5, and 6.0.

1. Fast conversion of Groupwise mailboxes Support multiple mailboxes conversion
2. Allow exporting archive data of Groupwise as well as public folders
3. Split larger PST files Support all version of Novell Groupwise
4. Converted PST files support all version of Outlook client
5. Allow user to save Grouwsie data into PST, RTF EML, MSG, PDF and HTML format
6. Free trial for evaluating the performance of the Sotware
7. Mailbox items preview before the conversion
8. Desired data conversion, using the item filter facility
9. Provides various Groupwise Conversion mode options such as Default, Online, Remote, Caching & Archive mode.

Read More, https://www.stellarinfo.com/email-tools/groupwise-to-pst-converter.php