To convert the one site version of WordPress to use the SSL/https version of the site, log into the WordPress Dashboard, go to “Settings” > “General” and change both “WordPress Address (URL)” and “Site Address (URL)” from the http URL to the https URL and click the blue “Save Changes” button.
This will result in internal links etc… created by WordPress to use the https versions rather than http, but it doesn’t change any internal links etc… that’s been added manually via WordPress Posts, WordPress Pages or that have been added by WordPress Theme and Plugin features.
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