Allows using any of your logged in devices as second factor
Allows users to log in with their email or custom username using the ISPConfig control panel API.
Allows administrators to restrict logins to their instance to specific IP ranges.
Allow users logging in using their mailbox credentials as managed via ISPConfig
An app for Nextcloud to allow an administrator to direct a user to an external site for changing their password.
Authenticate users against an jasig/apereo CAS Server (https://github.com/apereo/cas)