Replicating AD LDS instances on multiple servers provides greater load balancing and fault tolerance by distributing application ...

Replicating AD LDS instances on multiple servers provides greater load balancing and fault tolerance by distributing application data across servers. A replica of an existing AD LDS instance contains replicated copies of the configuration and schema directory partitions (including any schema extensions). You can specify a running AD LDS instance as the source from which to replicate, or you can use a restored copy of a previously backed up AD LDS instance as the data source.