I'm unable to set up my company email on my Macbook Pro because I downloaded Mountain Lion. I bought a refurbished Mac from the Apple store and they sent me the Lion operating system without a disc to reload the operating system and a free download from the App store for Mountain Lion. This is my 1st mac and Apple support will not help me because Microsoft Exchange 2003 server is not supported. I am very frustrated as many "Apple" experts have told me if I had not downloaded Mountian Lion there were many work-arounds like DavMail. Also Apple tech support said I would have to partition the hard drive and move Mountain Lion to one side. Can someone please help me!