Add properties ACL with DACLS

Hi all,

I'm trying to set the user properties ACL with a powershell DACLS command :

The command hangs each time I try to modify a specific property with a syntax command error. It works if I modify all the properties at the same time.

dsacls "CN=AGVAAL,OU=int,DC=ukf,DC=priv" /D john@uk.priv:RPWP;LogonHours;

Error : CategoryInfo          : ObjectNotFound: (LogonHours:String) [], CommandNotFoundException
FullyQualifiedErrorId : CommandNotFoundException

Thanks in advance