Search:

try to restart the Kerberos Key Distribution Center service on your first dc and then try to add.. also make sure the your new server is able to resolve dns properly.#

as the error message suggests, this is surely related to the user account which has been used while running dcpromo. make sure the account used have the administrative previleges

just out of curiosity, dont you guys have once common location for all the data which is representing any domain local group. that is the way i have designed my network..

dsquery computer -name * will list all the computers available in your domain, you can specify the OU parameters in the above command if know which Ou u r looking in