All Backup Exec services on the media server run in the context of a user account configured for the Backup Exec system services. You can create this account during the Backup Exec installation, or you can use an existing user account. To create a service account for Backup Exec during installation, enter the name and password of an Administrator account for the Backup Exec services to use.
If this computer is in a workgroup, enter an Administrators account, or an equivalent account that is part of the Administrators group on the computer. In the Domain list, select or enter the computer name.
The account that you designate for Backup Exec services, whether it is a new account or an existing user account, is assigned the following rights:
You cannot install Backup Exec with an account that has a blank password on Windows Server 2003/2008 or XP computers unless Windows is configured to allow it. If you try to do so, the following error message appears when Backup Exec services are created: