[UA-discuss] Universal acceptance status of directory-based identity-related services?

Dear colleagues, During the conversation with our developers we found out that sometimes one of the key stones of an information system software stack could be directory-based identity-related services, like MS Active Directory, FreeIPA, Samba etc... My apologize in advance if I've missed something in uasg.tech documents, but did someone made any researches about universal acceptance level of mentioned above software or maybe another  directory-based identity-related service? Thank you in advance for response, I would really appreciate any information around the topic. Best, Vadim. -- Respectfully, Vadim A. Mikhaylov Infrastructure consulting Coordination Center for TLD .RU/.РФ cctld.ru | кц.рф