Use this third party tool which i have been using this tool for very long time without any problem. i assure you that tool easily convert your groupwise data into pst without any technical problem. All the converted emails can be saved in MSG, EML and PST format with this GroupWise to PST conversion tool. It can fulfill all your conversion needs without a hitch. You can also append all such emails to the current PST file or save all of them in a fresh PST file while converting single mailbox or saving emails. this third party tool will give you full work efficiency.
Download this PST Converter that is capable to migrate any large PST file to MBOX, EML, EMLX, MSG, and several other formats. If you want to know the complete process of PST file conversion, then follow the manual guide. You can download the demo version of PST Converter.
As per Google advice, Best GroupWise to PST converter tool is Stellar Converter for GroupWise. So I decided to check the product. It’s seemed outstanding. Easy to download and install for Windows users.
Gives the option to select the mailbox from 4 modes, Online mailbox to PST, Remote mailbox to PST, Caching mailbox to PST, and Archive mailbox mode. Once you choose the mailbox, just hit the convert option to start the vote. You will get a free preview of your mailbox items, such as emails, attachments, contacts, bookmarks, contacts, etc. Once the process is complete, you can save the converted file in PST, MSG, RTF, EML, HTML, & PDF format.