How to Protect Messages Sent to Dynamic Distribution Lists

Office 365 Message Encryption protection is not available for messages sent to dynamic distribution groups. It’s all to do with rights management licensing. However, if you need to protect messages sent to dynamic distribution groups, for instance to make sure that confidential messages are inaccessible to external recipients use a sensitivity label instead and assign the special tenant-wide permission to recipients.

An Insight Into Microsoft Information Protection, Licenses, and Certificates

A recent conversation in the Microsoft Information Protection (MIP) community on Yammer about deleted templates led to a discussion about how this might affect users, like those who apply sensitivity labels with encryption to protect documents in SharePoint Online or email in Exchange Online. As it turns out, MIP has a backstop or get out of jail free card, but to understand how it works, you need to understand a little bit about publishing licenses and use licenses. We explain what happens in this article.