Messaging Server 5.0
Used to define a managed group. If a managed group is just a department or family group, then the structural class to use is top, but it can also be used to make a statically defined group (from groupOfUniqueNames) and make that a managed group.
top
auxiliary
2.16.840.1.113730.3.2.137
description, mnggrpAdditionPolicy, mnggrpBillableUser, mnggrpCurrentUsers, mnggrpDeletionPolicy, mnggrpMailQuota, mnggrpMaxUsers, mnggrpStatus, mnggrpUserClassOfServices, nsdaModifiableBy, owner