Windows Server 2003 Question:

The Backup directory in the %SystemRoot%System32DHCP folder contains backup information for the DHCP configuration and the DHCP database. By default, the DHCP database is backed up every 60 minutes automatically. To manually back up the DHCP database at any time, follow these steps:

1. In the DHCP console, right-click the server you want to back up, and then click Backup.

2. In the Browse For Folder dialog box, select the folder that will contain the backup DHCP database, and then click OK.