Verify if the network latency between the Federation Proxy Server and the Federation Servers falls within the acceptable ...

  1. Verify if the network latency between the Federation Proxy Server and the Federation Servers falls within the acceptable range. Refer to the Monitoring Section for trending values of the "Token Request Latency". A latency greater than [1500 ms] should be considered as high latency.If high latency is observed, ensure the network between AD FS and AD FS Proxy servers does not have any connectivity issues.
  2. Ensure Federation Servers are not overloaded with authentication requests. Monitoring Section provides trending views for Token Requests per second, CPU utilization and Memory consumption.
  3. If the above items have been verified and this issue is still seen, adjust the congestion avoidance setting on each of the Federation Proxy Servers as per the guidance from the related links.