About the Primary Servers Group
The Primary Servers group represents the physical pool of backup servers. As you create additional host groups, you'll add backup servers/clients from this Primary Servers group into your new logical groups. This Primary Servers group is created automatically and updated each day.
Note:
Do not create new host groups within this default primary group, as it is a system-maintained group, populated by Data Collectors. It is a best practice to retain this primary pool of servers. To set up logical groupings for reports, create additional host groups outside of this default group and add clients from the Primary Servers group.