As I explained on the daily meeting, please update the 'ManagedBy' attribute to a valid users of your Computers at your OU by end of this week, so that we will have a clear picture regarding who is using what computer for now. The basic rule is we shouldn't leave this feild as blank for any active computers at our domain. If it's the spare /IDLE PCs, please assign your name in, if it's shared PC, please use their manager's name.