You need to map your credentials. You can map a credential to:
• A domain/workgroup, by hitting the Map Credential To Domain/Workgroup button under Configuration/Scanning Setup/Scanning Credentials.
• A single Windows computer, by hitting the Map Credential To One Windows Computer button under Configuration/Scanning Setup/Scanning Credentials.
• A single IP address, by hitting the Map Credential To One IP Address button under Configuration/Scanning Setup/Scanning Credentials.
• An IP range submitted for IP Range Scanning, by hitting the green + button next to an IP range under Configuration/Scanning Setup/Scanning Methods.