All Computer Groups lists groups that have been previously created.
On this tab you can:
Specify particular groups that the account can view and manage. Select a group and click Add Group to move it to the Groups Managed by this Account box.
An administrator account can manage groups that are assigned to it, as well as any computers that the account added to Symantec LiveState Delivery. When the administrator logs into the Command Center, the All Computers group displays all the computers that the administrator is allowed to manage.
Check the Manage All Computer Groups checkbox to allow the administrator to manage all currently existing groups and groups that are created in the future.
This option is checked and cannot be changed for Administrator accounts with the role of Server Administrator. By definition, the Server Administrator role can manage all groups.
Tasks that can be performed on the groups depend on the Role assigned to the administrator.