I got an iphone 4 that perhaps has been deleted by using the delete function 'wipe out'.
is there a possibility to check on my device, if the erasing has happend over an exchange server..
There is no way to check, as the phone has been erased. If you had a corporate Exchange account on the phone one of the options is for the administrator to wipe the phone. Whether they did or not you will have to ask.
that was my private phone and my admin delte this over the exchange but i have no chance to look in the exchanges logs...
thats my problem :/
Assuming you backed up or synced the phone daily to either iCloud or your computer you can restore your personal content with no problem.
Retrieving data ...