To start, create the groups to which email recipients will belong. In this case, Sophos University requires three groups: one for the primary domain (sophosu.example.com) and one for each of the two subdomains (business.sophosu.example.com and science.sophosu.example.com). You will create these groups from the command line on the central server (CSM). The groups will be named "sophos", "business" and "science".
To create the groups:
For additional information, see "Creating a Group"