Officer of the Department of Defense, the Commander of United States Cyber Command, the Secretary of the Air Force, and the Commander of United States Space Command, develop and commence implementation of a Department-wide strategy regarding cyber protection activities for the Department of Defense space enterprise. (b) Elements The strategy developed and implemented pursuant to subsection (a) shall, at a minimum, address the following elements: (1) The coordination and synchronization of cyber protection activities across combatant commands, the military departments, and defense agencies. (2) The adoption and implementation of zero trust architecture on legacy and new space-based systems. (3) How the Department will prioritize the mitigation of known cyber risks and vulnerabilities to legacy and new space-based systems. (4) How the Department will accelerate the development of capabilities to protect space-based systems from cyber threats. (c) Briefing Not later than 150 days after the date of the enactment of this Act, the Secretary shall provide the congressional defense committees a briefing on the strategy developed and implemented pursuant to subsection (a). 1721. Requirements for implementation of user activity monitoring for cleared personnel and operational and information technology administrators and other privileged users (a) In general The Secretary of Defense shall require each head of a component of the Department of Defense to fully implement directives, policies, and program requirements for user activity monitoring and least privilege access controls for Federal Government and contractor personnel granted access to classified information and classified networks. (b) Specific user activity control requirements The Secretary shall require each head of a Department component to fully implement the detection, collection, and auditing of the following: (1) Sent and received emails, including sent attachments and emails sent outside of Federal Government domains. (2) Screen captures and print jobs,