MC280920 – Microsoft is changing the way users preview quarantined messages to provide additional security against embedded threats. With this change some components in quarantined messages will be distorted and not displayed by default. To see the full contents of the message, users can choose to reveal the full message.
This message is associated with Microsoft 365 Roadmap ID 82098
When this will happen:
How this will affect your organization:
Users will not initially see all components of a message in quarantine until they click the button to load external resources within the message.
Initial View
Enhanced View
What you need to do to prepare:
No action required. You may want to update your documentation accordingly.