Hi all, I am currently using a library to connect to Exchange (2007 and up) that uses Exchange Webservices. We have noticed an exceptionally CPU load on the server when synchronising alot of inboxes at the same time. I have not seriously looked at using RPC over HTTP(S) yet which Outlook Anywhere uses (this is something completely different right?) but I was wondering how server load compares, is it easier for the server to handle those calls? I'd love to hear your experiences.