If OK or Apply is clicked and any of the following conditions exist, then an error message appears:
The selected element no longer exists; it has been deleted by another user.
The selected element is referenced by one or more administratively enabled Discovery Attributes.
Note:
You can edit an administratively disabled Discovery Attribute, because changing the DNS Set attributes has no impact on active Realm discovery.
Any validation checks fail.
Any required field is empty (no value was entered).
The value in any field is not valid or is out of range.
The Realm Name is not unique; it already exists in the system.
The Connection Mode for a Realm being discovered is Initiator & Responder, and the Local Node assigned to the Discovery Attributes instance does not have a Listen Port assigned to at least one protocol.
Note:
In order for any dynamically-created Connection to act in the role of Responder, a Listen Port must be assigned for one or more protocols. If the Realm's Connection Mode is Initiator, then Listen Ports do not have to be supplied.
The Local Protocol Preference Override value is Yes, and the preference value for all protocols associated with any configured Application Id is zero or is missing.
The maximum number of a selected element already exists in the system.