I have an exchange server 2007 at a central site. From the central site I have several other sites connected by fiber to the site where the exchange server is. Those sites work fine. I have another site that is using a private WAN circuit. OWA works fine from any of the sites except for the last one where it takes a long time to load and sometimes it doesn't load at all. I can even access OWA from outside the organization and it loads fine. I have checked with the WAN provider and they cannot see anything wrong. Other web pages load fine. I ran wireshark and am seeing lots of TCP retransmits for connection to the exchange server but not sure where to go after that. Any help will be greatly appreciated!