To resolve challenges with user account management during migration to SaaS, which three solutions should the IT security department implement?

The focus on user account management during the transition to Software as a Service (SaaS) is critical for maintaining security and usability. Multifactor authentication is a key solution in this context because it adds an additional layer of security beyond just a username and password. This is especially important during migrations, as the risk of unauthorized access can increase. By requiring users to provide multiple forms of verification, such as a code sent to their mobile device or using biometric verification, the likelihood of unauthorized account access is significantly reduced. This is particularly valuable when migrating sensitive user data to the cloud, as it helps ensure that even if credentials are compromised, unauthorized individuals cannot easily access the account without the additional authentication factor.

Single sign-on and federation are also critical components to streamline user access and manage authentication, but they focus more on the ease of use and integration rather than enhancing security in the same way that multifactor authentication does. Password synchronization can help with user experience, ensuring users do not have to remember multiple passwords across different services, but it does not address the security concerns that multifactor authentication directly mitigates. Thus, in the context of enhancing security during account management, multifactor authentication stands out as the most vital solution.