To ensure that visitors to your website must use a secure connection, you will need to redirect them to SSL.

1. Log in to Plesk.

2. click on Websites & Domains.

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3. Locate the domain that you want to configure, and click on Hosting Settings.

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4. Under the Security section, select SSL/TLS support and Permanent SEO-safe 301 redirect from HTTP to HTTPS checkboxes.

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5. In the Dropdown box for Certificate, select the SSL certificate that you want to use for your site.

It should show your domain name in the drop-down.

6. Click on OK. Your site now onwards will use a secure connection for all web page requests.