Azure AD B2C AuthenticationResponseChallenge -


i'm working on azure ad b2c last few days, got sample , made running. issue facing aad b2c issue point #3, valuable comment in question may solve problem. example running fine me when implemented in solution, after giving aad b2c credentials i'am ending with:

   private async task onredirecttoidentityprovider(redirecttoidentityprovidernotification<openidconnectmessage, openidconnectauthenticationoptions> notification)     {         policyconfigurationmanager mgr = notification.options.configurationmanager policyconfigurationmanager;         if (notification.protocolmessage.requesttype == openidconnectrequesttype.logoutrequest)         {             openidconnectconfiguration config = await mgr.getconfigurationbypolicyasync(cancellationtoken.none, notification.owincontext.authentication.authenticationresponserevoke.properties.dictionary[startup.policykey]);             notification.protocolmessage.issueraddress = config.endsessionendpoint;         }         else         {             openidconnectconfiguration config = await mgr.getconfigurationbypolicyasync(cancellationtoken.none, notification.owincontext.authentication.authenticationresponsechallenge.properties.dictionary[startup.policykey]);             notification.protocolmessage.issueraddress = config.authorizationendpoint;         }     }

in 'else' part, authenticationresponsechallenge null, throwing error. can give me detailed reply causing , how resolve it?

i had same problem because actual policykey wasnt initiated correctly, make sure have "policyauthhelpers" (provided microsoft fix current libraries unable handle b2c). step code policyconfigurationmanager.cs , can find why breaks. verify have correct policies configured in web.config, example:

<add key="ida:signinpolicyid" value="b2c_1_signin" />

if doesnt of course hardcode it:

 openidconnectconfiguration config = await mgr.getconfigurationbypolicyasync(cancellationtoken.none, notification.owincontext.authentication.authenticationresponsechallenge.properties.dictionary["b2cpolicy"]);

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