Thank you for the suggestion! Unfortunately I'm not sure it will help - we don't have the vIDM appliance configured to use the DC that went down. Based on what I can tell in the configuration and debug logs it's using a DC that is online and reachable in a site unrelated to the DC that was offline. Not sure a load balancer would help this situation since it would still be sending traffic to these DCs that are online and capable of authenticating.
