AD Op Master RID Last Bind Monitor. This monitor generates an alert when the response time for a bind to the domain controller holding the Relative Identifier (RID) operations master role exceeds a specified period of time.
This means that the operations master has been responding in a less than optimal time for an extended period (by default, 10 hours for most operations masters).
The RID Master might be overloaded.
Review other alerts generated from the RID Master to determine whether it is overloaded.