Computer Science Homework Help

Can you help me understand this Cyber Security question?

This is a scenario based questions. this is the only instructions and the only thing i have. no file and documents

.You are the systems administrator for company ABC.  You have been notified by HR that their computer needs to have encryption using email.  You know that your company uses Microsoft Office365.  Explain step-by-step how to configure Office365 for encrypting email.