I see only 2 possibilities for this.

1. Have a timer that checks every now and then for a configuration change. This puts stress on the environment if you have a lot of screens that do this at the same time. I would not advice this.
2. Use an Service Side Event solution where you will signal the users session of the configuration change. You can then act upon this signal. I would implement this approach.

Hope this helps,

Vincent

Hi Syakir,

You can consider these two simple options as well

1. Every time user perform an action on the screen that sends a request to add/update any information in database, you perform a check whether configurations have been updated. If the new configurations allow user to perform the requested action then let it proceed, otherwise abort the request and show appropriate error message to user.

2. Add a java script on your screen which executes after every few seconds to check if the configurations have changed in database. If java script returns with a configuration change then refresh the screen with appropriate message to the user, otherwise let user continue his work. This one however is not an optimal solution as it involves unnecessary hits to the database.

Hope it helps!

Junaid

If the page is a Form, you can check if is there any changes when submit data and inform the user or reload the page or have other approach. 

Otherwise, use timer as mentioned before.

Regards,

João