After Phabricator has been deployed for a while, we will switch MozReview to a read-only mode and direct all its users to Phabricator. This is currently scheduled for late November/early December. Disabling the BMO authentication provider is one way of doing this, since we will likely still want to allow admins to log in. Some time after (exact date TBD), MozReview data will be migrated (bug 1381588) and the system will be deactivated (bug 1381589).
You need to log in before you can comment on or make changes to this bug.