To add entries to an existing Directory Server while preserving operational
attributes, such as
Ignore No User Modification control must be attached to the request. The Ignore No User
Modification control allows modification of certain attributes that have the No User
Modification constraint. Special care should be used with this control.
The Ignore No User Modification is only applied to ADD requests. Using the control to modify an existing entry, resulting in an operational attribute change, will fail.