title: .NET form authentication along side with OpenIDConnect is it possible
body: <p>We have a legacy .NET WebForm Saas application that uses .NET Framework 4.7.2 and authentication logic via the legacy web form authentication against local SQL database.  It tracks the authenticated session via cookie which is the standard for form authentication.</p>
  <p>We recently have a customer who requests SSO using their Azure AD to authenticate into our application.  Upon doing research around I've come up with SAML and OpenId Connect and I'm leaning toward OpenId Connect.</p>
  <p>The challenge is while this customer uses Azure AD, another customer may use AWS AD or some still wants to use the standard login form on our login page.</p>
  <p>Is this possible to have form authentication work along side with SSO? I'm still educating myself in SSO and it is confusing to say the least but I generally see people use an identity provider with multiple applications whereas we seems to go down the road of a single application using multiple identity providers while still support its own authentication method.</p>