How to disable convert eml into body

I’m in the process of migrating outlook to lotus notes. So some of my users still using outlook with domino server.

With outlook you can attach another emails as attachments.

Problem is that when the email attachments received in lotus notes clients, it will automatically convert the email attachment as part as the body email.

This confusing for lotus notes users. They are looking for attachment and it’s not there.

Is there a way to disable this feature?