You might have added a new secondary domain to your GroupWise system as you were creating it. Or you might be adding the first secondary domain to a small GroupWise system. In either case, the planning and procedure for adding a secondary domain on a new domain server is the same as if you were creating it in your initial GroupWise system.
The GroupWise 2014 R2 Installation Guide provides all of the information that you need to create a new secondary domain on a new domain server: