Use an OAuth 2.0 Identity Provider
Setup Multiple Identity Providers for SAP Analytics Cloud | SAP Blogs
External Authentication Services with ASP.NET Web API (C#) | Microsoft Learn
Using IdentityServer4 Auth in ServiceStack | Documentation
Adding an external Microsoft login to IdentityServer4 | Software Engineering
SAML authentication using an external Identity Provider - Skyhigh Security
asp.net mvc - IdentityServer 4, OpenIdConnect redirect to external sign-in url - Stack Overflow
Federated Authentication - Identity Server 5.3.0 - WSO2 Documentation
c# - Identity Server(OAuth2) implementation with integration to legacy systems(Forms Auth, ADFS,AD) - Stack Overflow
c# - How to integrate multiple Identity Providers with Identity Server 4, while also using Cookies and JWT auth - Stack Overflow
ASP.NET Core 3 - IdentityServer4 - Ep.19 External Providers (Facebook) - YouTube
Securing Microservices with IdentityServer4, OAuth2 and OpenID Connect fronted by Ocelot API Gateway | by Mehmet Ozkaya | aspnetrun | Medium
External JWT Identity Provider - FusionAuth
Custom Identity Provider
Role-based access control using Amazon Cognito and an external identity provider | AWS Security Blog
Terminology — IdentityServer4 1.0.0 documentation
OIDC Federated Authentication | Predix Platform | GE Digital
Implement an OpenIddict identity provider using ASP.NET Core Identity with Keycloak federation | Software Engineering
External Identity Providers | Okta Developer
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Configure an External Identity Provider for API Cloud Authentication - WSO2 API Cloud Documentation
External Providers / Multiple Azure AD Tenants · Issue #1242 · IdentityServer/IdentityServer4 · GitHub
Architecture overview U4IDS components Portal Authentication flow
