Keycloak is in one server and client apps are in different server

Hi team,

I am facing one issue in keycloak I have installed keycloak in one server and my application are in different server. when i am logging out from keycloak so my other applications are not getting logging out automatically. but if I install my application in same server where keycloak is running then this log out works fine.
my apps are React.js based and Jquery.

is there any configuration i am missing? please help