Add SSO documentation details.

docs.json

@@ -82,6 +82,7 @@
       {
         "group": "Paid Features",
         "pages": [
+          "paid/sso-authentication",
           "paid/organization-template-catalog",
           "paid/customer-workspaces",
           "paid/slack-bot"

paid/sso-authentication.mdx

@@ -0,0 +1,29 @@
+---
+title: 'SSO Authentication'
+description: "How to enable SSO Authentication in your environment"
+icon: 'grid'
+---
+
+import { NarrowImage } from '/snippets/narrow-image.jsx'
+
+<Info>
+**Single Sign-On (SSO)** is an Enterprise edition feature. See [pricing](https://www.openops.com/pricing/) for details.
+</Info>
+
+Community and Professional editions include a basic authentication system. The Enterprise edition lets you integrate OpenOps platform with your identity provider using SAML or OIDC.
+
+<img
+  src="/images/paid/sso-sign-in.png"
+  alt="SSO Sign-in page"
+  style={{ maxWidth: '400px', width: '100%', margin: '0 auto', display: 'block' }}
+/>
+
+In larger organizations, this enables centralized identity and access management, allowing IT and security teams to enforce authentication policies, manage user access through existing identity providers, and streamline onboarding and offboarding.
+
+## Enable SSO for your environment
+
+OpenOps supports Single Sign-On (SSO) through two authentication methods:
+- **SAML**
+- **OIDC (OpenID Connect)**
+
+To learn more or to enable SSO for your environment, please contact your OpenOps account manager.