Hi: Let me start by saying I am not an Exchange expert by any means. However we have two different network segments. One allows direct access outbound without having to go through squid (used only for a few select devices/users). The other needs to go through squid for outbound services. When on the segment that has to go through squid, Exchange Web Sevices does not work. But when on the other segment (that doesn't need squid) it works. Therefore I can only assume that squid is somehow blocking or breaking the connection. In checking the access log I do not see any DENIED messages for that connection. In the googling I did it seems to indicate that EWS does RPC over HTTPs. Is there a configuration in SQUID that has to be done to allow this? Thanks