NetWkstaSetUid2 API Returns Access Denied

• Microsoft Windows NT Workstation versions 3.5 and 3.51
• Microsoft Windows NT Server versions 3.5 and 3.51

SYMPTOMS

If you run a batch file that repeatedly logs a user on and logs using the NetWkstaSetUid2 API, you may receive "Access Denied" error messages.

NOTE: The error message that is returned depends on the application that is calling the NetWkstaSetUid2 API.

CAUSE

NetWkstaSetUID2 performs the following three distinct operations:

1. Discovery. A mailslot message is sent to all the domain controllers (DCs) in a domain. Each DC responds with a message indicating whether the user account exists on the DC, and contains the name of the DC responding. The client looks at the first response and ignores the others.

2. Authentication. To authenticate the password, the client calls NetUseAdd IPC$ to contact the first DC that responded.

3. Account Information. A remote API call is used to retrieve account information to determine if you are an administrator, your password expiration date, and so on.

RESOLUTION

To correct this problem, upgrade to Windows NT 3.51 (if you have not already done so) and install the latest U.S. Service Pack for Windows NT version 3.51.

STATUS

Microsoft has confirmed this to be a problem in Windows NT versions 3.5 and 3.51. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 3.51. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

   S E R V P A C K