@Marnix is ββcorrect - ADFS is an "access manager", not an "Identity Manager".
How you can customize pages, there is nothing that would prevent you from creating resource creation pages or adding links to the provisioning system.
Word to the wise: "standard" provision of ASP.NET pages for an SQL database that doesn't help you. ADFS is authenticated only for AD. You need to use AD membership.
In addition, for internal users who log onto their desktop with WIA and SSO behind the scenes in ADFS, you get standard password functionality, for example. password expires, change password, etc.
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