1. Login to Plesk control panel
  2. Go to websites and Domains option on the left side Default page in plesk
  3. Find your domain and click on the ‘Virtual Directories’ option
  4. Click on the ‘Directory Properties’ option Dirctory Properties
  5. Find Documents section, In that type your default page name and click on ADD button default page in plesk control panel
  6. Select your page name from the list and set priority first by click on UP button
  7. At last click on the OK button.