Buffalo TS-XL User Manual page 32

Advanced Settings
Workgroup/Domain Settings
To add the TeraStation to your workgroup or
domain, click Modify Settings.
Depending on your network type, you may
choose to authenticate in Workgroup, NT
Domain, or Active Directory Mode.
Note: Before configuring NT Domain
authentication, make sure that your
TeraStation's firmware is updated to version 1.01 or later.