To ensure that encrypted email messages sent to external recipients can be revoked or expire within seven days, you need to configure a sensitivity label with encryption settings in Microsoft Purview Information Protection. A sensitivity label allows you to encrypt emails and documents, set expiration policies (e.g., emails expire after 7 days), and enable email revocation How to configure it?
# Go to Microsoft Purview compliance portal # Information Protection
# Create a sensitivity label
# Enable encryption and configure the content expiration policy
# Publish the label to users