Universal Containers (UC) is using Active Directory as its corporate identity provider and Salesforce as...

 To dynamically update the agent role and permission sets using Active Directory as the corporate identity provider and Salesforce as the CRM for customer care agents, who use SAML based sign-on to login to Salesforce, the identity architect should use two mechanisms:

Use Login Flow in System Context to update role and permission sets. A Login Flow is a custom post-authentication process that can be used to add additional screens or logic after a user logs in to Salesforce. A System Context is a mode that allows a LoginFlow to run as an administrator user with full access to Salesforce data and metadata. By using a Login Flow in System Context, the identity architect can update the agent role and permission sets based on the information from Active Directory or other criteria.

Use SAML Just-in-Time (JIT) handler class run as an admin user to update role and permission sets. A SAML JIT handler class is a class that implements the Auth.SamlJitHandler interface and defines how to handle SAML assertions for Just-in-Time (JIT)provisioning. JIT provisioning is a feature that allows Salesforce to create or update user records on the fly when users log in through an external identity provider. By using a SAML JIT handler class run as an admin user, the identity architect can update the agent role and permission sets based on the information from the SAML assertion. References: Login Flows, SAML Just-in-Time Provisioning, Auth.SamlJitHandler Interface