Right now we use Blackberry's at work, but when I get the iPhone 4 I would rather just use that to get my work email if I can. I know my Exchange email address (it's just email@example.com versus my normal @company.com email address) but I have a couple questions: Does Exchange allow IT depts. to lock down Exchange to approved decives/device IDs? We have to change passwords every month or so, but I never have to do anything on my Blackberry to keep getting email pushed - how does Echange handle that? Would I have to just update my password every time it changes? Just looking for experience from those who have added their work email from and Exchange server to their personal iPhone.