Forum Discussion
ATP Attachments and Mail Rules
Tried to do a search to see if this has been discussed before, but did not find any. When you receive an email with an attachment and have ATP Attachment Scanning with Dynamic Delivery turned on, ...
I guess you can create a rule that checks for the default "Your attachments are being scanned..." text
Pay attention to the list of unsupported scenarios though: https://docs.microsoft.com/en-us/office365/securitycompliance/dynamic-delivery-and-previewing#are-there-scenarios-for-which-dynamic-delivery-is-not-available