In addition to the regular authentication methods, SonicOSX allows you to use Lightweight Directory Access Protocol (LDAP) to authenticate users. LDAP is compatible with Microsoft’s Active Directory.
For SonicWall appliances, you can select the SonicWall Single Sign-On Agent to provide Single Sign-On functionality. Single Sign-On (SSO) is a transparent user authentication mechanism that provides privileged access to multiple network resources with a single workstation login. SonicWall network security appliances provide SSO functionality using the SonicWall Single Sign-On Agent (SSO Agent) to identify user activity based on workstation IP address when Active Directory is being used for authentication. The SonicWall SSO Agent must be installed on a computer in the same domain as Active Directory.