[AzureADDS] Updating lightbox graphics

Author: iainfoulds

articles/active-directory-domain-services/media/tutorial-create-instance-advanced/create-vnet-expanded.png

@@ -126,7 +126,7 @@ Complete the fields in the *Network* window as follows:
     1. If you choose to create a virtual network, enter a name for the virtual network, such as *myVnet*, then provide an address range, such as *10.0.1.0/24*.
     1. Create a dedicated subnet with a clear name, such as *DomainServices*. Provide an address range, such as *10.0.1.0/24*.
 
-    ![Create a virtual network and subnet for use with Azure AD Domain Services](./media/tutorial-create-instance-advanced/create-vnet.png)
+    [![](./media/tutorial-create-instance-advanced/create-vnet.png "Create a virtual network and subnet for use with Azure AD Domain Services")](./media/tutorial-create-instance-advanced/create-vnet-expanded.png#lightbox)
 
     Make sure to pick an address range that is within your private IP address range. IP address ranges you don't own that are in the public address space cause errors within Azure AD DS.