Endpoint Agents are not reflected on UI under Investigate >>> Hosts although NWEAgent Service is running.
Most properly the connection on Port TCP/443 is not established, either there is blockage point in the path between the Agent and the server or we do have a mismatch in TLS and Ciphers options.
First of all, we need to test the connectivity between the Endpoint Agents and the server on both ports TCP/443 and UDP/444, so use Testnet utility and for more details follow the steps in Article 000038661.
In case there was error similar to the below, it means that the port is open but still the connection is not established.
If enabling the ciphers does not work, you can also check to see if there is a proxy in between the agent and the Endpoint Server. One of the client's machines opens a command prompt with runas administrator option. Type: netsh.exe winhttp show proxy The results either state directly connected or display the proxy that is used.
If the output displays a proxy IP, it is best work with the group responsible for managing proxy servers. A temporary measure would be to config the system to bypass proxy by the following means.
set proxy myproxy set proxy myproxy:80 "<local>bar" set proxy proxy-server="http=myproxy;https=sproxy:88" bypass-list="*.domainName.com"