You manage a Microsoft Exchange Server 2019 organization that contains several thousand users.
All the users connect to their mailbox by using a mobile device and Exchange ActiveSync.
You need to prevent the users from syncing email messages that are older than 14 days to the mobile devices.
What should you use?
A. an Outlook Web App mailbox policy
B. a mobile device mailbox policy
C. an ActiveSync device access rule
D. a conditional access policy
