Dynamics 365 App for Outlook: Quick Create from email to a Custom Entity (same ways as "add as Lead/Contact" button works)

Hi,

While Dynamics 365 App for Outlook allows to track and "set regarding" for custom entities and search against it (which is amazing!). I'm wondering if there a way (maybe with some programming?) to add an option to create a custom entity from email. The same way it works for native Lead and Contact, so all fields get populated from email, as it happens for Contacts.

Example: Vendor, Employee, Partner - any Contact like entity that for some reason was created as a custom entity in an D365 instance instead of having standard Contact reused as a different record type.

Anyone have idea how to enable or program this?

Thanks,
Alex