After placing the credentials of the agent and passes connecting to the Cisco UCCX, get the error message: There has timed out the request for connection to Cisco UCCX application server, verify that the system is online and try to new.
Your agent desktops are having problems connecting to the UCCX server, or some of the UCCX services may be out of service.
Check that the desktops can reach the server and that there are no firewalls or anti-virus software.
Check all services in UCCX are 'in service'. Go to UCCX admin --> Unified CCX Serviceability --> Tools --> Control Centre - Network Services. Make sure everything is in full service, in particular UCCX Engine and Cisco Desktop Services.
Are you AD integrated? Do you have more than one AD server listed for Authentication? Can you log into AppAdmin?
Sometimes what can happen is that: Your primary AD server is not responding in time, so CUCM uses the secondary AD server as a backup. However, CAD has a default timeout for login at 10 seconds, far too short to allow CUCM to try the secondary host.
If this sounds like what's happening to you, then you can manually increase the CAD timer by editing the following file on the Agent PC, and restarting CAD.