Employee ID field is available when creating a user account in an NT 4 domain.
Directory and Resource Administrator 6.x
Employee ID is a Windows 2000 field and is not applicable for NT4 domains. In the case of an NT4 domain this field is only displayed when creating a new user account. Any data entered in this field is discarded when creating a user in an NT domain.
This is corrected in DRA 7.0 and higher.