Question about Outlook Express

I work for a resort and I have a corporate email address that uses an exchange server. I am also having issues flagging emails when synced on my iPhone 5S running iOS7. I use Microsoft Windows XP with Outlook 2003 at work. I had a iPhone 3GS previously and everything worked fine. Since I've upgraded to the iPhone 5S, flagging emails on my iPhone does NOT sync with my outlook on my work computer. Is this a outlook/exchange bug or is this a bug within iOS7? I just want to make sure where ever the bug is at that it is being addressed. Everyone here I think wants the same thing, to just make sure what ever end the bug is at that those people know about it. Flagging for me in particualr is a huge service that I use and has slowed my work progress when I am not at work. Other co-workers who have other iPhones running iOS7 do not have this issue other than those who are using the iPhone 5S.

Thank you,

Matt