SilverSHielD v6.0 introduces significant enhancements to user management, especially with regards to its support for Active Directory.
It is possible to authenticate all your AD users in SilverSHielD by creating a special user profile and using * (star, or asterisk) as a username; that user must be allowed to perform password authentication, and the “use Windows/AD account auth” option must be enabled. See the image below for a visual example.
The above configuration will relay the authentication of all users without a profile in the SilverSHielD user database to the Active Directory. If a username is found in the SilverSHielD user database, anyway, the internal authentication will prevail, unless the configuration specifies something different.