Forum Discussion
MSFT 365 Defender - Email & Collaboration email preview not working
Just curious, why the email preview under Email & Collaboration (explorer) is not working any more (All emails) It says "Message details couldn't be found. When a message is soft deleted or hard...
Ben_Harris
Microsoft
MicrosoftHey there dmk199 ! - thanks for reaching out.
There are two things which spring to mind here, firstly, you'll need to have the "Preview" role (permission) - detailed here: The Microsoft Defender for Office 365 email entity page - Office 365 | Microsoft Learn
Also, any messages delivered externally, such as to on premises, will not be able to be previewed, as they do not exist in your Exchange Online instance anymore.
Thanks
Ben.