Restricts the maximum number of immediate subordinates of the superior
entry to an entry being added or imported. It is examined if the
protected item is an entry, the permission sought is add or import, and
the immediate superior entry is in the same DSA as the entry being added
or imported. Immediate subordinates of the superior entry are counted
without regard to context or access control as though the entry addition
or importing were successful. If the number of subordinates exceeds
maxImmSub, the ACI item is treated as not granting add or import access.