1. Log into your Plesk control panel
  2. Go to the "Websites & Domains" menu item on the left hand side

  3. Click on "Add Subdomain"

  4. Enter the desired subdomain and select the full domain from the following drop down
  5. Tick the Secure the domain Let's Encrypt. We highly suggest doing this.
  6. Enter your preferred email address for SSL Certificate notifications
  7. Press OK

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