How can you restrict a user to only one role when users normally have multiple UserRoles?

Adding microflow logic is the most effective way to restrict a user to only one role in a Mendix application where users typically may have multiple UserRoles. Microflows allow for complex logic to be executed during runtime, enabling you to implement checks and conditions that determine which roles a user can have based on their situation or actions within the app.

By designing a microflow that runs when a user is assigned or changes roles, you can ensure that if a user already has one role, any attempt to add a new role checks if that condition is met and can either block or remove the additional role. This dynamic approach offers flexibility and can be customized to fit various business rules.

In contrast, changing the user interface might improve user experience but does not enforce role limitations on the backend. Similarly, role-based logic in user preferences does not inherently prevent users from having multiple roles but rather manages their preferences and visibility. Altering user management settings might provide some level of control, but without the specific logic that microflows can provide, it wouldn't achieve the goal of restricting users to a single role effectively.