Im a little confused.

As an extra layer of security i am trying to configure the network with prestaged/managed computers.

At present i have over 100 machines already listed but there are about 350 missing. I am wondering how they got there if i didn't enter ether GUID or mac.

Any help would be appreciated

I would also like to achieve this for remaining clients but i am not aware of doing this without manually entering the GUID

thanks