Which of the following is NOT a prohibited action in MILPDS?

Accessing necessary data with authority is indeed not a prohibited action in MILPDS. This is because authorized personnel are given specific access rights to retrieve and manage data that they need to fulfill their responsibilities effectively. Having access to necessary information is integral to the operational functions of the system, allowing users to perform their duties while following established protocols and security measures.

In contrast, the other choices highlight actions that violate the integrity and security of the system. Unauthorized deletion of records can lead to data loss and compromise legal and operational accountability. Modification of personal information without permission can involve ethical breaches and privacy violations, undermining the trust and confidentiality that are essential in managing sensitive data. Similarly, unauthorized sharing of user credentials poses significant security risks, as it can lead to unauthorized access and manipulation of data, compromising overall system integrity. Thus, these actions are clearly defined as prohibited within the guidelines of MILPDS.