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Microsoft Resource Kits - Windows NT4 Resource Kit

Addusers.exe  (Windows NT4 Resource Kit)

The Window Server NT4 Resource Kit is a set of tools that NT domain administrators and engineers use to manage or support a Windows NT4 domain. Use it to streamline management tasks such as troubleshooting NT4 OS issues, managing an NT4 domain, and configuring networking/application services.
Addusers.exe
Dumps and imports user and group accounts in an Windows NT user account data base to a text file. Passwords are not included.

The format for the comma-delimited file requires headings for users [User], global groups [Global], and local groups [Local]. Before you use the /c option to create user accounts, it is recommended that you first execute AddUsers with the /d switch, the dump accounts option, which writes the headings, user accounts, local groups, and global groups to a file. Viewing this file gives a clearer picture of the structure and headings of the comma-delimited file.

You must be a member of the Administrators group on the target computer to add accounts and a member of the Users group to write accounts.