[@netweb Keymaster 9 years, 7 months ago]

Since switching to HTTPS you need to update your siteurl and homeurl to use HTTPS at /wp-admin/options-general.php

For multisite @ragir it depends how you have your site setup, this article covers your options on what you can, and can not do to switch to https for multisite 🙂

How to Set Up HTTPS on WordPress Multisite Without Headaches