How do I allow users to backup iPhone EXCLUDING Exchange data (no CONTACTS, Mail, Calendar, Tasks, etc) for BOTH iCloud and iTunes?

Question

We are EXTREMELY sensitive to corporate data and we wish to force compliance to our standards. We understand people need to back up THEIR data, but we are not willing to allow them to backup OUR data. We define OUR data to be any data that is entered into our Corporate Mail environment (Exchange 2007).  Is there a way to allow for backups to either iCloud or iTunes that does not back up Exchange Contacts, Mail, Calendar, Tasks, etc. ?
We are using Mobile Iron which provides a way to disable BackUp via iPhone profiles being distributed, but we wish to allow people the ability to backup their content, again, just not ours. And we've seen some very similar threads.
We have noticed that the backups do not backup Mail and Calendar items, but it does backup Contacts. That's the sticking point.
Any help would be most appreciated. This is a major concern.

Answer 1

OK, sounded like a good suggestion, perhaps it only appeared the data was being backed up, but in reality the connection was being made and the contacts were some how syncing back w/ the cached credentials restablishing sync with the server. That would not have explained why messages and calendar items didn't resync; but I was willing to take it for a test spin. Wiped device, changed password in AD (so that it couldn't sync), began restore, and after restore with AD password changed prior to restore, the two test Exchange contacts were regrettably on my phone. Further test the reasonable theory of maybe credentials are being restored and the only contact data is being actually synced to get the data back on the phone, I added a third contact.
Now just to be belt and suspenders (to make sure something isn't happening at the restore where it get's the contact information at that exact window of time), I am wiping my again to see if the third contact (that's in my exchange contacts on the server) makes it to my device possibly during the sync, but I'm pretty sure what is happening is that he contact is making it "or being" some how categorized as "phone" data as opposed to Exchange data and being backed up there erroneously. For instance if you were to create a contact on an iPhone prior to establishing a sync relationship with the exchange server, it would take that contact and create that contact on your exchange server for you so that your "phone" data and your "exchange" data (as it relates to contacts at least) are in sync.
If you grant this assumption, then, when syncing Exchange data, the "phone" data is being created. When the back up takes place, I believe there is no distinction or bifurcation of these two data types. Phone data is backed up with no rhyme or reasoning related to its history or origin of creation (i.e. where it came from), it's not a contact from Exchange, it's just a contact. I believe Apple needs to tattoo Exchange contacts in some fashion or provide a "transparency" kind of paradigm or model used for calendars, where you can see two sources intermingled in a view, but they are truly not (you just see all).
Apple has indicated they understand the severity of this and are looking into it, but if anyone else has any insight or profiles not discussed on
http://help.apple.com/iosdeployment-ipcu/#app665501b0
Please sound off, and thank you imanog and bonesaw for your contributions.