Successful sign-in to an Edge Server is heavily dependent on correctly configuring the DNS.
When troubleshooting any Edge Server issue, it is important to check that all necessary DNS records exist and are resolving to the correct IP addresses.
The following sample NSLookup sequence within a command prompt checks the host record of the pool:
A successful query returns a name and an IP address. Verify that the IP returned matches the IP addresses assigned to the Edge Servers or load balancer and that no extra, or surprise, IP addresses are ...