# Service: Enterprise Single-Sign-On Source: https://lean-coders.at/en/service-enterprise-single-sign-on > SSO integration for companies in Vienna – SAML, OAuth, OIDC. One login, all systems, GDPR-compliant. Less attack surface, faster onboarding Post-its are not a password manager LEAN Stability: Enterprise Single-Sign-On Log in. Done. 1. Overview 2. Challenges 3. Benefits 4. Pilot Phase 15 systems, 27 passwords, no overview. We integrate Enterprise SSO – SAML, OAuth, OIDC – GDPR-compliant and scalable. One login, all systems. ## What is it about? Too many systems, too many passwords, too many security gaps – and an IT department playing helpdesk instead of building infrastructure. Enterprise SSO cleans up. **Your benefit:** - Onboarding speed ↑ - User satisfaction ↑ - Attack surface ↓ ## Do you know? Every system has its own login Employees juggle dozens of passwords – and write them in private password managers or even on post-its. Every new tool means: New credentials, new management, new support tickets. This costs time and stifles tool innovations. User management is decentralized and manual Onboarding means: Creating accounts in each system individually. Offboarding means: hoping no one forgets to deactivate access. Inconsistent access rights are just a matter of time. Security suffers from complexity No central view of access rights and active sessions. Password policies differ per system – the weakest link determines the security level. ## What does this bring you? One login for all systems Employees authenticate once and have access to everything they need. No five passwords, no password resets, no friction. Faster onboarding and secure offboarding New employee: one account, all systems unlocked. Employee leaves: one click, all accesses blocked. Central, traceable, immediate. Less attack surface Central password policies, MFA, session management. One security level for all systems instead of five different vulnerabilities. GDPR-compliant user management Roles, rights, and accesses centrally documented. Audit-ready, without hunting down Excel sheets. ## Pilot Phase Deliver first, then commit. That’s what the pilot is for. Duration 6-10 weeks Assessment Which systems need SSO? Which protocols (SAML, OAuth, OIDC) are relevant? What role structure does your organization represent? Derived from this IAM selection, configuration, integration plan Deliverables Selection of an IAM system including configuration of 1 realm, 1 client, and up to 3 roles Configuration of all necessary token settings, redirect URIs, and claim mappings Filling with test data 20 fictitious users or up to 100 imported existing users Deployed for internal testing purposes ## Frequently Asked Questions FAQ ### Do we have to replace our existing Active Directory? No. Keycloak, Auth0, and others can sit as an identity broker in front of your existing AD or LDAP. Your user database remains, SSO is added on top. ### Which IAM system do you recommend? We prefer working with Keycloak, Authentik, zitadel (Open Source, self-hosted) for full control. Azure AD if you are already in the Microsoft ecosystem. Auth0 or Okta as a managed solution. We recommend based on your infrastructure. ### How long does it take to connect another system? If the IAM is set up and the target system supports SAML or OIDC: days, not weeks. The groundwork is done in the pilot – after that, each additional connection is incremental. ### What about systems that do not support SSO? There are options. For legacy systems without SAML/OIDC support, there are workarounds – reverse proxies, header-based authentication, API gateways. We clarify in the assessment what is possible. ### Is this GDPR-compliant? Yes. Central user management makes GDPR easier, not harder: right to information, deletion, access logs – all in one place. With self-hosting (Keycloak), the data does not leave your infrastructure. ### What is the pilot phase? A clearly defined project with a defined scope – typically 4–12 weeks. You won’t receive a concept paper at the end, but a working result: real code, tested and deployed. The pilot shows you what we can do before you make a long-term decision. ### What happens after the pilot phase? After the pilot comes the proof: We look together at the results – what worked, what was worth it, where are the gaps? Everything measured against defined KPIs, not gut feeling. Based on this, you decide: scale, adjust, or stop. No pressure, no upselling. If the proof convinces, we go into scale – your project grows, your team grows with it, the knowledge stays with you. ### Do I have to start with a pilot phase? No. The pilot is our recommended entry point because it creates clarity for both sides – but it’s not a must. If you already know what you need and want to get started right away, we can also join an ongoing project or start directly in a larger scope. We adapt to your pace. ### Do you work T&M or fixed price? Start as a timeboxed pilot in T&M (optional with cap). No fixed price risk, no lock-in. You see at any time what you are paying for – and can stop anytime. But very few do. Book a discovery call with your expert now He has debugged more token flows than most devs have written login forms. When it comes to SSO, there's no edge case he hasn't seen.