Update howto-use-managed-identity.md

Author: zackliu

articles/azure-signalr/howto-use-managed-identity.md

@@ -83,7 +83,7 @@ Setting access token validation in Function App is easy and efficient without co
 
 2. Select **Log in with Azure Active Directory** in **Action to take when request is not authenticated**.
 
-3. Select **Microsoft** in the identity provider dropdown. The option to create a new registration is selected by default. You can change the name of the registration. For more details on enabling aad provider, please refer to [Configure your App Service or Azure Functions app to use Azure AD login](../app-service/configure-authentication-provider-aad.md)
+3. Select **Microsoft** in the identity provider dropdown. The option to create a new registration is selected by default. You can change the name of the registration. For more details on enabling Azure AD provider, please refer to [Configure your App Service or Azure Functions app to use Azure AD login](../app-service/configure-authentication-provider-aad.md)
     :::image type="content" source="media/signalr-howto-use-managed-identity/function-aad.png" alt-text="Function Aad":::
 
 4. Navigate to SignalR Service and follow [steps](howto-use-managed-identity.md#add-a-system-assigned-identity) to add a system-assigned identity or user-assigned identity.