I know there’s things like CeligoExtend etc, but has anyone created their own bespoke “get email from Outlook -> NS Record” or “drag and drop email into NS Record” thing?

I know i've seen drag and drop tools to add files to transactions\entity\items, but that would just add the email as a .msg file like an attachment. Probably not what you're looking for, but if you think it would help, check out extendtech's file add on. I have multiple clients who use it.