Explaining why the offline access is required

Author: jmprieur

Microsoft.Identity.Web/StartupHelpers.cs

@@ -112,6 +112,9 @@ public static IServiceCollection AddMsal(this IServiceCollection services, IEnum
             {
                 // Response type
                 options.ResponseType = OpenIdConnectResponseType.CodeIdToken;
+                
+                // This scope is needed to get a refresh token when users sign-in with their Microsoft personal accounts
+                // (it's required by MSAL.NET and automatically provided when users sign-in with work or school accounts)
                 options.Scope.Add(OidcConstants.ScopeOfflineAccess);
                 if (initialScopes != null)
                 {
@@ -145,4 +148,4 @@ public static IServiceCollection AddMsal(this IServiceCollection services, IEnum
             return services;
         }
     }
-}
+}