x500A. X.500 is the most common directory-management protocol. Two X.500 standards exist: the 1988 version and the 1993 version. Windows 2000’s Directory Service (DS) implementation isSpecifications X500 Operating System Windows 10 Pro Mobile Computing Platform Intel® Core™ i5-7440EQ 2.9GHz Max. 3.6GHz - 6MB Intel® Smart Cache Platform options: