Change hosting server for SharePoint Provider Hosted

I have created a Provider Hosted App for SharePoint Online. I used Azure hosting server to host my app business logic.

Now, somehow I want to move my Hosting server from Azure to another domain. But my app is already published on Office Store and my users already installed the apps and they are using.

I want to know that how I can change my hosting environment for PHA without disturbing the existing users.

What kind of configuration I will need to change in my App?