The other day I was trying to access some restricted preferences on a 10.6 client, bound to a 10.6 Server that no longer existed, and because of this, I had no way of removing the restrictions
Or so I thought, thankfully Apple had provided a Knowledge Base article detailing how to manually flush the cache, enabling access to the previously restricted preferences.
To do this, I opened up Terminal and input the following command all on one line
dscl . -list Computers | grep -v "^localhost$" | while read computer_name ; do sudo dscl . -delete Computers/"$computer_name" ; done
This worked, I was able to amend the settings needed, I have provided the link to the Apple page below, in case you need information on how to do this on earlier OS’s