Forum Discussion
Attachment Count for Exchange Online Traffic
Hello everyone,
I'm managing a project on my customer, and they wish to block their users when an email sending inside-to-inside, outside-to-inside, inside-to-outside and if email contains 20 or more attachment or mode than 20 MB of size.
20 MB size is easy to do, because, can be configured on default DLP policies. But, I'm not sure that to count attachment. Is there any way to do it with other services, like; Defender for Cloud App, Insider Risk Managemet, Exchange Online Transport Rules.
Thank you!
5 Replies
- There's nothing built-in in M365 to address this scenario.
- Thank you for answer!
Do you know, any work-around here ?- Perhaps some Outlook add-in can do it. Using custom transport agents is not possible in Exchange Online, so outside of client-side solution, the only thing that comes to mind is redirecting the mail flow to external system that can satisfy this criteria.
