Realm Editing

When you edit an existing realm you cannot make changes to the following:

Agent: The Agent that protects a server where an existing realm is located cannot be changed. If you need to change the Agent, you must delete the realm and recreate it with the new Agent.
Resource Filter: The resource filter of an existing realm cannot be changed. If you need to change the resource filter, you must delete the realm and recreate it with the new resource filter.