I have a pair of ACS 1113 appliances with replication configured. I'm authenticating against a pair of AD domain controllers with the Remote Authentication Agent installed. The Primary ACS appliance has no problem authenticating against either of the remote agents howver the replica appliance doesn't appear to be able to authenticate against either of them. the Error "External DB is not operational" is always received in the failed log on the replica. the Primary and replica have identical external user database configuration.
Both appliances are running version 4.1(1)23
Any assistance would be greatly appreciated.