[msid] Updated the authorization endpoint for Azure AD China

Author: msewaweru

docs/identity-platform/authentication-national-cloud.md

@@ -51,7 +51,7 @@ The following table lists the base URLs for the Azure AD endpoints used to acqui
 |----------------|-------------------------|
 | Azure AD for US Government | `https://login.microsoftonline.us` |
 | Azure AD Germany| `https://login.microsoftonline.de` |
-| Azure AD China operated by 21Vianet | `https://login.chinacloudapi.cn` |
+| Azure AD China operated by 21Vianet | `https://login.partner.microsoftonline.cn/common` |
 | Azure AD (global service)| `https://login.microsoftonline.com` |
 
 You can form requests to the Azure AD authorization or token endpoints by using the appropriate region-specific base URL. For example, for Azure Germany:

docs/identity-platform/scenario-web-app-sign-user-app-configuration.md

@@ -82,7 +82,7 @@ In ASP.NET Core, these settings are located in the [appsettings.json](https://gi
     // - "https://login.microsoftonline.com/" for Azure public cloud
     // - "https://login.microsoftonline.us/" for Azure US government
     // - "https://login.microsoftonline.de/" for Azure AD Germany
-    // - "https://login.chinacloudapi.cn/" for Azure AD China operated by 21Vianet
+    // - "https://login.partner.microsoftonline.cn/common" for Azure AD China operated by 21Vianet
     "Instance": "https://login.microsoftonline.com/",
 
     // Azure AD audience among: