AT Command May Fail Copying Files to a LAN Manager Server

• Microsoft Windows NT operating system version 3.1
• Microsoft Windows NT Advanced Server version 3.1

SYMPTOMS

If you use the AT command to schedule a batch file that copies files to a Microsoft LAN Manager server in a different Domain, the batch file may fail and you will receive an "Access Denied" error message. However, if you execute the batch file from a Command Prompt, it successfully copies the files without generating an error message.

Example Batch File:

   Net Use z: \\LMServer\Share
   copy test.txt z:\
   Net Use z: /d

CAUSE

Without Domain information for the user account, using the AT command does not succeed. This is because the account it is trying to validate is the Administrator. The Schedule Service uses the Administrator's rights for all access.

Without Domain information for the user account, using the AT command does not succeed. This is because the account it is trying to validate is the SYSTEM account. By default, the Schedule service uses the SYSTEM account for access rights.

WORKAROUND

There are two workarounds for this problem:

• Supply Domain information for the User in the "Net Use" command, such as the following

        Net Use z: \\LMServer\share password /USER:LMDomain\guest
  

  where "guest" must be a valid account in the "LMDomain" Domain.

  -or-

• Have the Schedule Service log on as a valid account on that LAN Manager server by doing the following:

  1. In the Control Panel window, choose the Services icon.

  2. Select the Schedule Service, and then choose Startup.

  3. Type the user account on the LAN Manager server (which matches a

        local account) with sufficient rights and type the appropriate
        password.
  

  4. Restart the service so the changes take effect.

  This option does not require changing the command line and will be permanent unless it is changed.