There was this section below on final step on the First 2016 DC install in the forest.
The File Replication Service (FRS) is deprecated. To continue replicating the SYSVOL folder, you should migrate to DFS Replication by using the DFSRMIG command. If you continue to use FRS for SYSVOL replication in this domain, you might not be able to add domain controllers running a future version of Windows Server.
Saw a few articles that said to run the following command (shown with output):
Current DFSR global state: 'Start'
Looks like I am on FRS???
What is the process to migrate?
What is the impact of migrating over?
What check points should I be doing to test DFSR