Mac Mail - Exchange corrupting mailbox

Hello,

I bought a new macbook pro, as I hate using pc's for work. I emailed IT asking them how to setup my mac mail and they stated:

"If by "Mail" you mean the built-in client on your Mac, no we don't. We don't support that client since it corrupts mailboxes. "

Has this been resolved? Is there workarounds? Advice?

Thanks!