I'm crazy about what happening again now.

A person who has an iPhone 4 (ios 4.3) comes to me because his datasync account (it's a profile) is not working good anymore.
- Missing appointments
- Mail works fine.

So i started a "reinitialize user" from the datasync console.

After 20 minutes everything is up and running and the missing appointments are back.
Today the person comes back to tell me that he lost all his iPhone contacts (no, not the contact from groupwise) but his own telephone contacts.

How is that possible?
I've seen it earlier. While removing the datasync profile (datasync exchange account) then all the phone contacts were gone.

Why is something touching things that has nothing todo with datasync?

I'm scared this is not the last time.