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  • Transforms the message from plain text in to unreadable ciphertext

  • Keeps the message in ciphertext while in transit to protect the message from being read if intercepted

  • Decrypts the message via a key or authenticated response

How to Encrypt an Email

How to Tell an Email is Encrypted

"Do Not Forward" Feature


Microsoft has provided the following resources/documentation for users to review regarding O365 encryption and message security: