User Profile Error: Create or UpdateResource failed at step Create Connection

I'm creating a Failover farm, using the same credentials as the original farm. In Configure Synchronization Connections > Create New Connection, I'm using the same Connection Name, Type, Connection Settings, and Containers as the original farm.

However, I'm getting an error. ULS returns:

originalMaConfiguration.Create or UpdateResource failed at step Create Connection  --- Microsoft.ResourceManagement.WebServices.Faults.ServiceFaultException: Unable to process Create message     at Microsoft.ResourceManagement.WebServices.Client.ResourceTemplate.CreateResource()     at Microsoft.ResourceManagement.WebServices.ResourceManager.CreateResource()     at Microsoft.Office.Server.UserProfiles.DirectoryServiceConnection.UpdateInternal()

How to troubleshoot?

Thanks,

Scott