Link with Arrow in internal Message

Hello Experts,

i have a complexe Scenario(for me ) to create Invoices.

If the CardCode not found, i create a draft with a Dummy-Customer.

then i create a internal Message to inform the User about this Draft.

This works perfectly, but now i will in this internal Message give a Link to the Draft.

It is possible? When yes how can i get create this Link?

Thanks and best Regards

Ronny