Added a link to the latest Identity developer's introduction to MS Graph recording

.gitignore

@@ -104,3 +104,6 @@
 /4-WebApp-your-API/4-2-B2C/.vs
 /4-WebApp-your-API/4-2-B2C/Client/obj
 /4-WebApp-your-API/4-2-B2C/TodoListService/obj
+/2-WebApp-graph-user/2-3-Multi-Tenant/.vs/WebApp-OpenIDConnect-DotNet
+/2-WebApp-graph-user/2-3-Multi-Tenant/bin/Debug/netcoreapp2.2
+/2-WebApp-graph-user/2-3-Multi-Tenant/obj

2-WebApp-graph-user/2-1-Call-MSGraph/README.md

@@ -26,6 +26,8 @@ To run this sample:
 >
 > go through the previous phase of the tutorial showing how the [WebApp signs-in users with Microsoft Identity (OIDC) / with work and school or personal accounts](../../1-WebApp-OIDC/1-3-AnyOrgOrPersonal). This page shows the incremental change required to call the Microsoft Graph API on behalf of a user that has successfully signed in to the web app.
 
+- Developers who wish to gain good familiarity of programming for Microsoft Graph are advised to go through the [An introduction to Microsoft Graph for developers](https://www.youtube.com/watch?v=EBbnpFdB92A) recorded session.
+
 ### Step 1: Register the sample with your Azure AD tenant
 
 You first need to [register](../../1-WebApp-OIDC/1-1-MyOrg#step-1-register-the-sample-with-your-azure-ad-tenant) your app as described in [the first tutorial](../../1-WebApp-OIDC/1-1-MyOrg)

2-WebApp-graph-user/2-4-Sovereign-Call-MSGraph/README.md

@@ -26,6 +26,8 @@ To run this sample:
 >
 > go through the previous phase of the tutorial showing how the [WebApp signs-in users with Microsoft Identity (OIDC) / with work and school](../../1-WebApp-OIDC/1-2-AnyOrg). This page shows the incremental change required to call the Microsoft Graph API on behalf of a user that has successfully signed in to the web app.
 
+- Developers who wish to gain good familiarity of programming for Microsoft Graph are advised to go through the [An introduction to Microsoft Graph for developers](https://www.youtube.com/watch?v=EBbnpFdB92A) recorded session.
+
 ### Step 1: Register the sample with your Azure AD tenant
 
 You first need to [register](https://github.com/Azure-Samples/active-directory-aspnetcore-webapp-openidconnect-v2/tree/master/1-WebApp-OIDC/1-4-Sovereign#step-2-register-the-sample-with-your-azure-ad-tenant) your app as described in [Web app signing-in users in Sovereign](hhttps://github.com/Azure-Samples/active-directory-aspnetcore-webapp-openidconnect-v2/tree/master/1-WebApp-OIDC/1-4-Sovereign#scenario)

5-WebApp-AuthZ/5-2-Groups/README-incremental-instructions.md

@@ -133,6 +133,8 @@ If a user is member of more groups than the overage limit (**150 for SAML tokens
 
 > When attending to overage scenarios, which requires a call to [Microsoft Graph](https://graph.microsoft.com) to read the signed-in user's group memberships, your app will need to have the [Directory.Read.All](https://docs.microsoft.com/en-us/graph/permissions-reference#group-permissions) for the [getMemberObjects](https://docs.microsoft.com/en-us/graph/api/user-getmemberobjects?view=graph-rest-1.0) function to execute successfully.
 
+- Developers who wish to gain good familiarity of programming for Microsoft Graph are advised to go through the [An introduction to Microsoft Graph for developers](https://www.youtube.com/watch?v=EBbnpFdB92A) recorded session.
+
 #### When using the implicit_grant flow to authenticate
 
 In case, you are authenticating using the [implicit grant flow](https://docs.microsoft.com/en-us/azure/active-directory/develop/v1-oauth2-implicit-grant-flow), the **overage** indication and limits are different than the apps using other flows.

5-WebApp-AuthZ/5-2-Groups/README.md

@@ -214,7 +214,7 @@ If a user is member of more groups than the overage limit (**150 for SAML tokens
 
 > An Identity Office Hours session covered Azure AD App roles and security groups, featuring this scenario and how to handle the overage claim. Watch the video [Using Security Groups and Application Roles in your apps](https://www.youtube.com/watch?v=V8VUPixLSiM)
 
- > You can use the `BulkCreateGroups.ps1` provided in the [App Creation Scripts](./AppCreationScripts/) folder to create a large number of groups and assign users to them. This will help test overage scenarios during development.
+> You can use the `BulkCreateGroups.ps1` provided in the [App Creation Scripts](./AppCreationScripts/) folder to create a large number of groups and assign users to them. This will help test overage scenarios during development.
 
 ##### Order of processing the overage claim
 
@@ -226,6 +226,8 @@ If a user is member of more groups than the overage limit (**150 for SAML tokens
 
 > When attending to overage scenarios, which requires a call to [Microsoft Graph](https://graph.microsoft.com) to read the signed-in user's group memberships, your app will need to have the [Directory.Read.All](https://docs.microsoft.com/en-us/graph/permissions-reference#group-permissions) for the [getMemberObjects](https://docs.microsoft.com/en-us/graph/api/user-getmemberobjects?view=graph-rest-1.0) function to execute successfully.
 
+- Developers who wish to gain good familiarity of programming for Microsoft Graph are advised to go through the [An introduction to Microsoft Graph for developers](https://www.youtube.com/watch?v=EBbnpFdB92A) recorded session.
+
 #### When using the implicit_grant flow to authenticate
 
 In case, you are authenticating using the [implicit grant flow](https://docs.microsoft.com/en-us/azure/active-directory/develop/v1-oauth2-implicit-grant-flow), the **overage** indication and limits are different than the apps using other flows.