Final answer:
Azure Information Protection (AIP) is the Azure security solution that allows users to identify email messages for encryption and protection.
Step-by-step explanation:
The Azure security solution that allows users to identify email messages that should be protected through encryption, identity, and authorization policies is Azure Information Protection (AIP).
Azure Information Protection is a cloud-based solution that helps organizations classify and protect their sensitive data. It enables users to define policies that automatically apply encryption and other protection measures to specific emails or email attachments based on specified criteria such as keywords or recipient groups.
For example, a user can create a policy that automatically encrypts any email containing the word 'confidential' in the subject line or sent to a specific group of recipients. This helps ensure that sensitive information is always protected in transit and can only be accessed by authorized individuals.