ADPREP was unable to modify the default security descriptor on object %1. Status/Consequence Adprep attempts to merge the ...

ADPREP was unable to modify the default security descriptor on object %1.
[Status/Consequence]
Adprep attempts to merge the existing default security descriptors with the new access control entry (ACE). 
[User Action]
Check the log file ADPrep.log in the %2 directory for more information.