A. When you perform a backup and include the system state, the information the OS includes in the backup will vary depending on the type and state of the machine. The following table lists the elements the OS backs up:

Element to be Backed up Domain Controller Non-Domain Controller
Active Directory (NTDS) Yes No
System Volume (SYSVOL) Yes No
Boot files Yes Yes
Registry Yes Yes
COM+ class registration database Yes Yes

The OS will back up information about certificate services regardless of domain controller (DC) status.