On Thursday, 30 July 2020, Acquia Site Factory applications running Drupal 8.x and 9.x will be able to utilize HTTP Authentication for site collections. This feature essentially allows customers to secure non-primary sites of a site collection behind a self-provisioned username and password, so that only certain users can access and make edits to secondary sites.
Although the HTTP Authentication feature has previously only been available for Acquia Cloud Site Factory applications on Drupal 7.x, the configuration setting has appeared in the user interface for all customers. As a result, some customers with Acquia Cloud Site Factory applications running Drupal 8.x or 9.x may have enabled the feature in the UI and noticed no effect.
Prior to 30 July 2020, when this feature is made available for Acquia Site Factory applications running Drupal 8.x and 9.x, we will be turning this feature off in the UI for any customers with Acquia Cloud Site Factory applications running Drupal 8.x or 9.x who had previously enabled the feature.
This will have no effect on application performance, and will allow customers with Acquia Cloud Site Factory applications running Drupal 8.x or 9.x to enable this feature at a time of their choosing and convenience after the 30 July 2020 release. If you then wish to enable the HTTP Authentication feature at a later date, you can follow our documentation for enabling this feature.
If you have any questions about this or any other changes to the Acquia's Drupal Cloud platform, you can contact Acquia Support by logging into https://cloud.acquia.com and visiting the Acquia Help Center.