Update relyingparty.md

Relaying party policy SSO EnforceIdTokenHintOnLogout parameter

Author: yoelhor

articles/active-directory-b2c/relyingparty.md

@@ -8,7 +8,7 @@ manager: celestedg
 ms.service: active-directory
 ms.workload: identity
 ms.topic: reference
-ms.date: 01/25/2019
+ms.date: 01/31/2020
 ms.author: marsma
 ms.subservice: B2C
 ---
@@ -122,6 +122,8 @@ The **SingleSignOn** element contains in the following attribute:
 | --------- | -------- | ----------- |
 | Scope | Yes | The scope of the single sign-on behavior. Possible values: `Suppressed`, `Tenant`, `Application`, or `Policy`. The `Suppressed` value indicates that the behavior is suppressed. For example, in the case of a single sign-on session, no session is maintained for the user and the user is always prompted for an identity provider selection. The `TrustFramework` value indicates that the behavior is applied for all policies in the trust framework. For example, a user navigating through two policy journeys for a trust framework is not prompted for an identity provider selection. The `Tenant` value indicates that the behavior is applied to all policies in the tenant. For example, a user navigating through two policy journeys for a tenant is not prompted for an identity provider selection. The `Application` value indicates that the behavior is applied to all policies for the application making the request. For example, a user navigating through two policy journeys for an application is not prompted for an identity provider selection. The `Policy` value indicates that the behavior only applies to a policy. For example, a user navigating through two policy journeys for a trust framework is prompted for an identity provider selection when switching between policies. |
 | KeepAliveInDays | Yes | Controls how long the user remains signed in. Setting the value to 0 turns off KMSI functionality. For more information, see [Keep me signed in](custom-policy-keep-me-signed-in.md). |
+|EnforceIdTokenHintOnLogout| No|  Force to pass a previously issued ID token to the logout endpoint as a hint about the end user's current authenticated session with the client. Possible values: `false` (default), or `true`. For more infomation, see [Web sign-in with OpenID Connect](openid-connect).  |
+
 
 ## JourneyInsights