Hello, I seem to have a permission problem on a clients Exchange installation. I have a working WebDAV application that can Send/ Receive/Delete emails and handle appointments, but in this particular environment I am having problems when sending mail using Windows Authentication. Using an account with SendAs/ReceiveAs permissions and using Windows Authentication, I create an item in a users Drafts folder (with a PUT request) but when I try to MOVE the item to the ##DAVMailSubmissionURI## I get a 403 - Forbidden result from the Exchange server. No extra information in the reply. I can however fetch emails, and appointments without problem, with these same settings. Using the same application but setting it to use Basic Authentication with explicit username/password I can successfully send email for that username, leading me to believe that it is a permission/authentication problem. The Exchange environment is large and complex so it's hard to figure out what could be wrong. The machine running my application is on one domain and it is directly contacting backend Exchange servers which are on another domain and I think most of the user accounts belong to a third separate domain... I'm stumped. Anyone have any idea what could be wrong? Thanks in advance, - Jellobiaffra
