We recently installed Outlook 2011 for MAC after we moved a users mailbox to our new Exchange 2010 SP1 server. Outlook is able to connect to exchange and download all emails, calendar, etc... however when you send an email you receive the following message:
HTTP error. The server cannot fulfill the request.
Mail could not be sent. The message has been moved to your Drafts folder.
Account name: "Exchange"
Error code: -18500
I can see that the email has been moved to the drafts folder. OWA works on the MAC, Outlook 2010 on PC also work with no issues. I can even see the email moved into the drafts folder in OWA.
I have searched everywhere and most people seem to have this issue with large attachments but it happens for every email that I send. I have done the fixes for the large attachments hoping that would fix it but no luck so far.
Any assistance anyone could give would be greatly appreciated!