How do I support Okta and Azure AD for enterprise sign-in?

To support Okta and Azure AD (Microsoft Entra ID) for enterprise sign-in, the usual approach is to add SAML 2.0 and/or OpenID Connect (OIDC) as your federated login options.

Recommended approach

For most modern apps:

• Use OIDC if you can
  • Simpler for web/mobile apps
  • Better developer experience
  • Easier user/session handling
• Use SAML if you need broader enterprise compatibility or are integrating with older IdPs/workflows

Many products support both, since some enterprises prefer SAML and others prefer OIDC.

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High-level architecture

1. Your app acts as the Service Provider (SP) for SAML or Relying Party / Client for OIDC.
2. The customer’s Okta or Azure AD tenant acts as the Identity Provider (IdP).
3. Admins configure trust between your app and their IdP.
4. Users click “Sign in with SSO,” are redirected to Okta/Azure AD, authenticate there, then return to your app with a token/assertion.
5. Your backend validates the response and creates an app session.

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For OIDC support

What you need

• A way to register each customer tenant as an OIDC identity provider
• Support for:
  • Authorization Code flow
  • PKCE if you have SPA/mobile clients
  • JWT validation
  • User mapping / account linking

For Azure AD

You’ll typically register your app in:

• Azure Portal → App registrations
• Configure:
  • Redirect URI
  • Client ID
  • Client secret or certificate
  • Scopes like openid, profile, email

For Okta

You’ll register an OIDC app in:

• Okta Admin Console → Applications
• Configure:
  • Redirect URI
  • Client ID / secret
  • Sign-in redirect URIs
  • Issuer URL

Your app should handle

• Discovery metadata:
  • /.well-known/openid-configuration
• JWKS key rotation
• ID token validation:
  • signature
  • issuer
  • audience
  • nonce
  • expiration
• Tenant-specific issuer/client config

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For SAML support

What you need

• Your app as a SAML SP
• Generate:
  • SP metadata
  • ACS URL
  • Entity ID
  • Signing certificate if required

For Azure AD

Admins create an Enterprise Application and configure:

• Identifier (Entity ID)
• Reply URL (ACS URL)
• Claims mapping
• User/group assignment

For Okta

Admins create a SAML app integration and configure:

• Single Sign-On URL (ACS URL)
• Audience URI (Entity ID)
• NameID / attributes

Your app should handle

• SAML response validation
• XML signature verification
• Audience / recipient / destination checks
• Clock skew
• NameID and attribute mapping

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User provisioning considerations

SSO alone only authenticates users. You also need to decide how users are created in your app:

Common patterns

• Just-in-time provisioning (JIT)
  • Create user on first successful SSO login
• SCIM provisioning
  • IdP automatically creates/updates/deactivates users in your app
  • Best for enterprise lifecycle management
• Manual provisioning
  • Less common for enterprise SaaS

Recommendation

Support SCIM 2.0 if possible. Many enterprise customers expect:

• user creation
• attribute updates
• deprovisioning
• group sync

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Multi-tenant support

If you sell to many companies, each customer may have:

• their own Okta org
• their own Azure AD tenant
• unique domains and policies

You’ll need:

• A tenant config model in your database
• IdP metadata per tenant
• A way to route login based on:
  • email domain
  • tenant subdomain
  • explicit enterprise login button

Example:

• acme.yourapp.com
• user enters @acme.com
• you route to Acme’s configured IdP

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Security best practices

• Use SP-initiated login whenever possible
• Require signed assertions/tokens
• Validate issuer, audience, timestamps, and replay protection
• Use HTTPS everywhere
• Rotate secrets/certificates
• Keep a strong account linking policy to avoid identity takeover
• Log auth events for auditability
• Support MFA by deferring to the IdP

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UX recommendations

Provide:

• A normal email/password login
• A “Continue with SSO” option
• Enterprise login via email domain discovery
• Clear error messages when the wrong tenant/IdP is used

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If you’re choosing what to implement first

A practical rollout order:

1. OIDC for Okta and Azure AD
2. SAML support for enterprise compatibility
3. SCIM provisioning
4. Optional:
   • domain discovery
   • group-to-role mapping
   • audit logs
   • just-in-time provisioning

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Minimum viable implementation checklist

• Support per-tenant IdP configuration
• OIDC authorization code flow
• JWT validation
• SAML SP support if needed
• User mapping / JIT provisioning
• SCIM 2.0 if enterprise-grade provisioning is needed
• Admin setup docs for Okta and Azure AD
• Tenant-level SSO test flow

If you want, I can also provide:

1. a concrete implementation plan,
2. example Okta/Azure AD setup steps, or
3. sample code for OIDC or SAML integration in your stack.