Which properties cannot be changed after a user is created in the cloud service?

The user name is a critical identifier within the cloud service that typically cannot be altered once the user account has been established. This restriction helps maintain consistency and integrity within the system, as changing a user name can affect various dependencies, such as access rights, auditing processes, and user-specific configurations.

On the other hand, aspects like passwords, email addresses, and roles tend to be more flexible. Users can often reset their passwords for security purposes as needed, modify their email addresses to ensure communication remains effective, and change roles to better reflect their duties or responsibilities within the organization. The stability of the user name as a primary key for user identification is the key reason why it is not subject to change.