Users who exist in Microsoft Entra ID or LDAP but have no local account
were blocked at the email-first login step because the system required a
local user record before showing SSO options. This adds a domain-based
fallback: when the email is unknown locally, the system checks tenant SSO
configurations for matching allowed_domains and presents SSO-only login
options, enabling the existing JIT provisioning to trigger on callback.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add LDAP as a third authentication option alongside local password and
Microsoft Entra ID SSO. Per-tenant configuration supports Active Directory,
OpenLDAP, and FreeIPA with configurable attribute mapping, search-then-bind
and direct-bind methods, encrypted bind credentials (AES-256-GCM),
profile sync on login, and user auto-provisioning via external identity
linking.
Includes admin UI for connection settings with test-connection button,
login page LDAP form, 25 new PHPUnit tests, and de/en translations.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
