It's really quite straightforward, at least if you have IMAP enabled in Groupwise:
- Go to Account Settings -> Account Actions -> Add email account...
- Hopefully you know your name and email address.
- For server, use the name of your groupwise server. (Eg, gw.yourdomain.example) [It may also get autodetected as something like mail.yourdomain.example, although in my case that did not match the certificates.]
- Choose an encryption option (any should work).
- Profit. :)
Next steps, at least for me:
- Figure out LDAP settings.
- Find a way to liberate calendar data.
I probably should check with our Groupwise admins...