Using IIS ARR as Reverse Proxy for Exchange 2013 and Lync 2013

I have set up IIS ARR for use with Lync 2013 and Exchange 2013.

Lync 2013 is working fine.

I have tried to follow the Exchange server blog about configuring IISARR for Ex2013 (http://blogs.technet.com/b/exchange/archive/2013/07/19/reverse-proxy-for-exchange-server-2013-using-iis-arr-part-1.aspx).  I get a 404 not found error when running OWA from external and acive sync fails.  remote connectivity Analyzer doesn't help either.

In the blog it has the URL rewrite as Match URL using Widlcards with a PAttern of * and then an {HTTP_Host} condition of mail.tailspintoys.com

Is this correct?  should it be mail.tailspintoys.com/*

I have created 2 farms and iurl rerwrties, one for Autodiscover and one for Mail.

Any ideas?  thanks.