Technical Tip: EMS Console displays message Bad Request (400) when accessing through the browser

[mithing]

Description	This article describes that EMS Console displays the message Bad Request (400) when accessing through the browser.
Scope	FortiClient EMS On-Prem.
Solution	If accessing EMS on Prem using FQDN through the browser, it may display the message Bad Request (400). To resolve: Ensure the FQDN is resolved to the correct EMS IP address. This can use nslookup and ping commands for checking. Check the EMS setting: Login into EMS Console (using the application) -> System Setting -> EMS Settings and ensure the setting for 'Remote HTTPS Port' is checked (ticked). Refresh the browser and it should show the display console as expected. As a general recommendation, always make sure the FortiClient EMS services are UP and running at the Windows server: