APPARATUS AND METHOD FOR IDENTIFYING A VIRTUAL MACHINE HAVING CHANGEABLE SETTINGS

At a first time of detecting, from among a plurality of virtual machines as management targets, a first virtual machine that has not stored therein identification information generated based on an internal time of the computer, an apparatus causes the first virtual machine to store first identification information generated based on a first internal time of the computer corresponding to the first time, and at a second time of detecting a second virtual machine which has stored the first identification information and whose setting regarding network connection has been changed after storing the first identification information, the apparatus cause the second virtual machine to store second identification information generated based on a second internal time of the computer corresponding to the second time.