Which Computer Object attribute can tell me when the object was placed in an OU?

Hello,

Its there an attribute of the Computer object in AD which can tell us when the object was 'placed' in a OU?  When-Created and CreateTimeStamp indicates the date the object was created, so this would help when an object is first placed in an OU, but if the object is moved to a different OU and back to the original OU, these attributes would not help.  Any suggestions?

Thanks for your help! SdeDot