Update custom-policy-reference-sso.md

Removing the IncludeSessionIndex metadata

Author: yoelhor

articles/active-directory-b2c/custom-policy-reference-sso.md

@@ -9,7 +9,7 @@ manager: celestedg
 ms.service: active-directory
 ms.workload: identity
 ms.topic: reference
-ms.date: 02/27/2020
+ms.date: 03/02/2020
 ms.author: mimart
 ms.subservice: B2C
 ---
@@ -120,20 +120,19 @@ This provider is used to suppress the "choose identity provider" screen. It is t
 
 ### SamlSSOSessionProvider
 
-This provider is used for managing the Azure AD B2C SAML sessions between a relying party application or a federated SAML identity provider. When using the SSO provider for storing a SAML identity provider session, the `IncludeSessionIndex` and `RegisterServiceProviders` must be set to `false`. The following `SM-Saml-idp` technical profile is used by the [SAML technical  profile](saml-technical-profile.md).
+This provider is used for managing the Azure AD B2C SAML sessions between a relying party application or a federated SAML identity provider. When using the SSO provider for storing a SAML identity provider session, the `RegisterServiceProviders` must be set to `false`. The following `SM-Saml-idp` technical profile is used by the [SAML technical  profile](saml-technical-profile.md).
 
 ```XML
 <TechnicalProfile Id="SM-Saml-idp">
   <DisplayName>Session Management Provider</DisplayName>
   <Protocol Name="Proprietary" Handler="Web.TPEngine.SSO.SamlSSOSessionProvider, Web.TPEngine, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
   <Metadata>
-    <Item Key="IncludeSessionIndex">false</Item>
     <Item Key="RegisterServiceProviders">false</Item>
   </Metadata>
 </TechnicalProfile>
 ```
 
-When using the provider for storing the B2C SAML session, the `IncludeSessionIndex` and `RegisterServiceProviders` must set to `true`. SAML session logout requires the `SessionIndex` and `NameID` to complete.
+When using the provider for storing the B2C SAML session, the `RegisterServiceProviders` must set to `true`. SAML session logout requires the `SessionIndex` and `NameID` to complete.
 
 The following `SM-Saml-idp` technical profile is used by [SAML issuer technical profile](connect-with-saml-service-providers.md)
 
@@ -147,7 +146,7 @@ The following `SM-Saml-idp` technical profile is used by [SAML issuer technical
 
 | Attribute | Required | Description|
 | --- | --- | --- |
-| IncludeSessionIndex | No | Indicates to the provider that the session index should be stored. Possible values: `true` (default), or `false`.|
+| IncludeSessionIndex | No | Not currently used, can be ignored.|
 | RegisterServiceProviders | No | Indicates that the provider should register all SAML service providers that have been issued an assertion. Possible values: `true` (default), or `false`.|