A simple tutorial to guide you with the steps to restart the IIS application pool in plesk.
Refer the below given steps to know how to restart IIS application pool in Plesk
Step 1: Login to your Plesk Panel account by entering your user name and password.
Step 2: Choose Website and domains.
Step 3: Scroll down and find the Dedicated IIS Application Pool for Website menu for the domain which you need to restart the IIS application pool.
Step 4: Click on Stop to stop the running IIS application pool.
Step 5: To restart the IIS application pool, click on Start.
Step 6: You have now successfully restarted the IIS application pool.