This feature is not yet released. It will be available on Jan 14, 2020. See the Self-service purchase FAQ.
Self-Service Registration Products
Hello all,
In the "Microsoft 365 admin center" you can call the "Azure Active Directory" as admin in the left column. There you will find a link to "Licenses" and then a link to "Self-Service Registration Products".
Following this link, you will be taken to a list of our free and paid licenses. I do not know how this list came about. Anyway, you could remove the individual products (but do not add anything, maybe because they are all our licenses.)
Now I understand the term "self-service registration products" as meaning that any user with an account in our area of office.com can obtain a self-service license. But that does not seem to be the case, because I do not see a possibility for a normal user. I always have to assign him a license as an admin myself.
Have I misunderstood "self-service registration products"? But what else is meant by that?
Greetings and thank you for your effort
Ralph