Teams media messages (images, code snippets, video messages, audio messages, wiki images) Teams call and meeting recordings stored in Teams storage Teams chat notifications, Teams chat suggestions by Cortana, Teams status messages User and signal information for Exchange Online Exchange Online mailboxes that aren't already encrypted using mailbox level DEPs Microsoft Information Protection exact data match (EDM) data – (data file schemas, rule packages, and the salts used to hash the sensitive data) It's mentioned that encryption may take some time to achieve after a data encryption policy is enacted. Data is currently only encrypted from the time of policy assignment, though retroactive encryption is in the works.