Your company has salespeople who use Apple iPad tablet computers for travel. These salespeople need a way to use company files offline while traveling and then to synchronize the files on a server when they return. What Windows Server 2016 capability meets this need?

Answer: Work folders

Explanation: Work folders are used in the manner of bring your own device (BYOD) for the accessing the work files on computer system, operating devices and other such tools. It stores the files and it's data for management, organizing and controlling them by file servers that are centrally managed known as sync share.

Work folder also maintain the security by encryption method, passwords etc. These files can be accessed from anywhere even in offline mode by the official of the company. Thus as per the requirement mentioned in the question work folder should be deployed.