I was updating our Windows Group Policy today when I noticed that on the Satellite Server Replication page 4 servers out of the 15 are Unavailable. What is the best way to troubleshoot this? We've had users complaining about extremely long logins and I begin to wonder if it's because they're pulling our policy across the WAN instead of from their local office.

Linux. ZCM 10.3.1 on the servers, 10.2.2 on the clients.