To enable IIS application pool for a domain:
Once you enable the application pool, all your web applications will be using it.
To stop all applications running in the application pool, click
IIS Application Pool on your Home page and click
Stop.
To start all applications in the application pool, click
IIS Application Pool on your Home page and click
Start.
To restart all applications running in the application pool, click
IIS Application Pool on your Home page and click
Recycle. This can be handy if some applications are known to have memory leaks or become unstable after working for a long time.
To disable IIS application pool for a domain: