@Ankur Bawiskar : Thanks for your response.

Right now we have azure sso login for our instances. And we have set the session timeout for example 30 mins. By default, it will go to the servicenow logout page.  We need it as such it goes to the azure sso login page, where user can click login button to log in back.  For this, what I tried is like setting the servicenow homepage url itself as logout url.  With sso what happens is like, when session times out it goes to microsoft login page and automatically logs in the user without waiting for user to press login.   

I tried the other way around where user is logged into the instance and he manually logs out from his profile, which in turn returns user back to microsoft login page and waits until user clicks login. This basically kills the user session.

I am trying to achieve the same behavior with session timeout. For which the user session needs to be killed.

Or anyother alternate way you could suggest?