# login to Admin Console
# go to {nav Configuration > Website > Advanced} section
# enable these settings:
* `Require SSL for Administrative Console`
* `Enable MOD_REWRITE for SSL`
# specify SSL url to the website in `SSL Full URL (https://www.domain.com/path)` setting
# save changes
# reload the page
# confirm, that Admin Console is served under SSL now
# press `Generate Page` button on same page
# open `/system/maintenance.html` page under SSL
# confirm, that page is displayed and looks correct (as page from `/maintenance.html` URL, that is used to generate it)