Universal Containers (UC) has Active Directory (AD) as their enterprise identity store and wouldlike to...

The optimal way to implement SSO with Active Directory as the enterprise identity store is to use Salesforce Identity Connect as the identity provider. Salesforce Identity Connect is a software that integrates Microsoft Active Directory with Salesforce and enables single sign-on (SSO) using SAML. It also allows user data synchronization between Active Directory and Salesforce and profile and permission set assignment based on Active Directory group membership. Option A is not a good choice because using Active Directory with reverse proxy as the identity provider may not be supported by Salesforce or may require additional configuration and customization. Option B is not a good choice because using Microsoft Access Control Service as the authentication provider may not be available, as Microsoft has retired this service in 2018. Option C is not a good choice because using Active Directory Federation Service (ADFS) as the identity provider may not allow user data synchronization or profile andpermission set assignment based on Active Directory group membership, unless it is combined with another tool such as Salesforce Identity Connect.