SSO/SAML Admin documentation

Hi,

I’m looking for the SSO/SAML administrator documentation. On https://apps.nextcloud.com/apps/user_saml
the link points at a now non-existent NC 13 documentation page. If you know where to find this
documentation, please let me know.

Thanks,
Adrian

This may be old, but AFAIK still relevant.

https://docs.nextcloud.com/server/12/admin_manual/configuration_server/sso_configuration.html