>now, I don't see many places using Exchange switching to Thunderbird, Because you couldn’t. There was a TB extension “OWL” but it wasn’t good enough for me,

>now, I don't see many places using Exchange switching to Thunderbird, Because you couldn’t. There was a TB extension “OWL” but it wasn’t good enough for me, still lacked things like the contact cards with data from your Active Directory install, and other default Outlook features. So the point for me is now you could take that path - maybe.