This conversation begins with a simple nice article here:
we all have many systems that we log into, as well as we manage multiple users in our organizations who log in to various tools and systems.
for internal use cases, LDAP and AD, work great, but for external products, it does not. because of security concerns etc.
The goal of this spree, is to get a great implementation that will help us use Nethserver
as a user management system, that connects to a user federation, then we can make use of SSO and SAML, as well as other technologies to authenticate with other servers.