Integrating each SaaS solution with an Identity Provider (IdP) is the most effective way to address the security issue. This approach allows for Single Sign-On (SSO) capabilities, where users can access multiple SaaS applications with a single set of credentials while maintaining strong password policies across all services. It simplifies the user experience and ensures consistent security enforcement across different SaaS platforms.
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CompTIA Security+ SY0-701 Course Content: Domain 05 Security Program Management and Oversight.
CompTIA Security+ SY0-601 Study Guide: Chapter on Identity and Access Management.