An ITenantGroupSet object contains ITenantGroup elements and defines methods to add, find, and remove tenant groups.
This collection is accessible from the DataAdminService. This collection is also accessible through the TenantGroups property on ITenant. In this case, it represents all the tenant groups in which the tenant, specified by the ITenant object, is a member. Adding and removing ITenantGroup objects to and from the set adds and removes groups in which the specified tenant is a member.