AutoInsert

AutoInsert is a process that automatically adds computers or users to the organization tree if the Installer is called on the respective computer or in the respective user context.
The new computers and/or users are inserted in a standard container (New Users & Computers) or another user-defined container. With AutoInsert, computers can be inserted with their full DNS name.

If you are using DSM OS Deployment:
Computers you reinstalled with OSD, are automatically added to the DSM organization with AutoInsert.
The computer name is the MAC address of the network card used for the PXE boot.