Logout user without action

Try using Deactivate User then Reactivate User again in the workflow's exception flow. 

Na, I wont do that. what if they are part of SSO ?

suresh2804  why do you want force logout ?

I would probably trigger a integration object after 30 sec using exception flow which calls and Appian webApi that has following code

a!httpResponse(
statusCode: 307,
headers: {
a!httpHeader(name: "Location", value: "https://testingenv.appian.com/suite/logout")
}
)

I have not tested this idea, Let me know if it works suresh2804 

Try this, I made something similar in the past with http headers and it worked....

Sure Agniwesh