You are the Office 365 administrator for your company.
Many employees work in remote locations with intermittent Internet connectivity. Employees must be able to
access and reply to email messages, and access calendars, even when their devices are not connected to the
Internet.
You need to ensure that employees can access their Microsoft Exchange content offline.
What should you do?

A.
Deploy and configure the AppFabric Caching service.

B.
Deploy and configure a BranchCache server.

C.
Configure the Microsoft OneDrive for Business Windows Sync client for offline access.

D.
In Internet Explorer 10, configure Outlook Web App (OWA) for offline access.

Explanation:
Offline access lets you use Outlook Web App on your laptop or desktop computer when you’re not connected
to the Internet. After you’ve enabled offline access, Outlook Web App will work in an offline mode as needed
depending on your network connection. When you’re online, Outlook Web App will automatically update the
offline information.

https://support.office.com/en-us/article/Using-Outlook-Web-App-offline-3214839c-0604-4162-8a97-
6856b4c27b36