Merge pull request SharePoint#5961 from Greg-Hitchon/master

Add troubleshooting tip for use with Azure Functions v3

Author: andrewconnell

docs/sp-add-ins/using-csom-for-dotnet-standard.md

@@ -1,7 +1,7 @@
 ---
 title: Using CSOM for .Net Standard instead of CSOM for .Net Framework
 description: Explains the differences between using CSOM for .Net Standard versus CSOM for .Net Framework
-ms.date: 6/26/2020
+ms.date: 6/29/2020
 ms.prod: sharepoint
 localization_priority: Priority
 ---
@@ -102,7 +102,10 @@ public static async Task Main(string[] args)
 #### AuthenticationManager sample class
 
 > [!Note]
-> Update the defaultAADAppId with the application id of the app you've registered in Azure AD
+> Update the `defaultAADAppId` with the application id of the app you've registered in Azure AD
+
+> [!Note]
+> If you are using CSOM for .NET Standard with Azure Functions v3 you may encounter a runtime error related to **System.IdentityModel.Tokens.Jwt**. This can be resolved by following [this workaround](https://github.com/Azure/azure-functions-host/issues/5756).
 
 ```csharp
 using Microsoft.SharePoint.Client;