Reverse Proxy with Exchange 2010 (Apache Users)

I am in the process of migrating from Exchange 2007 to 2010 and have hit a snag with the reverse proxy settings. My httpd.conf file that had been working with Exchange 2007 is as follows:

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LogFormat = "%host %other %logname %time1 %methodurl %code %bytesd %refererquot %uaquot"
CustomLog /var/log/apache2/access.log combined

LoadModule  proxy_module         /usr/lib/apache2/modules/mod_proxy.so
LoadModule  proxy_http_module    /usr/lib/apache2/modules/mod_proxy_http.so
LoadModule  headers_module       /usr/lib/apache2/modules/mod_headers.so
LoadModule  expires_module       /usr/lib/apache2/modules/mod_expires.so
LoadFile    /usr/lib/libxml2.so

ProxyPass /owa http://internal_ip/owa
ProxyPass /Microsoft-Server-ActiveSync http://internal_ip/Microsoft-Server-ActiveSync

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Running on:

VMware 5.1 guest

Linux 2.6.32-5-amd64

Apache 2.2.16 (Debian)

I change the internal_ip from the 2007 server to the 2010 server and I'm unable to use OWA from a web browser or connect mobile devices. Reverting internal_ip to the 2007 server results in OWA and mobile devices working for mailboxes on the 2007 server, but no connectivity for users with mailboxes on the 2010 server. I have spent a few days now trying to find a solution to this through various channels with no luck. Based on what I have been able to find, it sounds like this can only be done now through Microsoft ForeFront for some reason (something to do with M$ using a non-standard protocol), but I'm hoping that isn't the case. I am fervently hoping someone on this list has had a similar experience and could provide some guidance. Thank you very much.

Adam Gross | agross@xxxxxxxxxxx | 859-630-8722

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