Ensure that the following requirements are met if you have installed Administration Console and Identity Server on different machines:
The following ports are opened between the machines:
Ports 8080 and 8443 must be open between the server and the clients for the clients to log in to Identity Server. For more information, see Setting Up Firewalls.
Time is synchronized between the two machines. Ensure that both machines are configured to use a Network Time Protocol server.
If firewalls and time synchronization do not solve the problem, run the reimport script. See Reimporting Identity Server.