A simple restore will reload only the Active Directory Database. It makes no other changes to your computer. It is the quickest and easiest way to restore the AD database.
A simple restore will reload only the Active Directory database files (typically C:\Windows\NTDS\*) and the System Volume (typically C:\Windows\SYSVOL\*).
A simple restore can be done only on the original computer where the backup was made.
A simple restore can reload AD from a backup of the System State created by Windows Server Backup (wbadmin start systemstatebackup).
Contrast with Comprehensive Restore
A comprehensive restore is required when moving AD to a new computer.
Advantage of a Simple Restore
The advantage of a simple restore is that it requires only the System State, runs quickly, and makes minimal changes to your computer. It restores only the NTDS files and the SYSVOL folder.
For more information
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