The best solution toprevent exporting reports except when logged in using AD credentials while maintaining the ability to view reports when logged in with Salesforce credentials is to use SAML federated authentication, treat SAML sessions as high assurance, and raise the session level required for exporting reports. SAML federated authentication is a process that allows users to log in to Salesforce with an external identity provider (IdP), such as AD, that authenticates the user and issues a security token to Salesforce. By treating SAML sessions as high assurance, Salesforce assigns a higher level of trust and security to the sessions that are established by SAML federated authentication. By raising the session level required for exporting reports, Salesforce requires users to have a high assurance session before they can export reports.
This solution ensures that only users who log in with AD credentials can export reports, while users who log in with Salesforce credentials can still view reports but not export them.
The other options are not valid solutions for this scenario. Using SAML federated authentication and blocking access to reports when accessed through a standard assurance session would prevent users who log in with Salesforce credentials from viewing reports at all, which is not the desired outcome. Using SAML federated authentication and custom SAML JIT provisioning to dynamically add or remove a permission set that grants the export reports permission would require UC to write custom code and logic to implement the JIT provisioning and manage the permission set, which could increase complexity and cost. Using SAML federated authentication with a login flow to dynamically add or remove a permission set that grants the export reports permission would also require UCto write custom code and logic to implement the login flow and manage the permission set, which could introduce errors and performance issues. References: [SAML Single Sign-On], [Session Security Levels], [Set Session Security Levels for Your Org], [Just-in-Time Provisioning for SAML], [Login Flows]