Microsoft KB Archive/843250

= You cannot schedule a remote job by using the AT command from a Windows XP-based computer =

Article ID: 843250

Article Last Modified on 6/5/2007

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APPLIES TO


 * Microsoft Windows XP Professional for Itanium-based systems
 * Microsoft Windows XP Professional for Itanium-based systems
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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SYMPTOMS
When you try to schedule a job on a Microsoft Windows NT 4.0-based computer by using the at command from a Microsoft Windows XP-based computer, you may receive the following error message:

The authentication service is unknown.

When you try to schedule a job on a Microsoft Windows 2000-based computer or on a Microsoft Windows Server 2003-based computer by using the at command from a Windows XP-based computer that is in an untrusted domain, you may receive the following error message:

Access is denied.



CAUSE
This problem may occur if one of the following conditions is true:  You install the MS04-011 security update on your Windows XP-based computer.

For additional information about the MS04-011 security update, click the following article number to view the article in the Microsoft Knowledge Base:

835732 MS04-011: Security update for Microsoft Windows

The MS04-011 security update includes the following changes:  The security update changes the remote procedure call (RPC) bind on the client in Netapi32.dll when a call is made to the NetScheduleJobAdd function. The security update includes a call to the RpcBindingSetAuthInfoEx function that has the RPC_C_AUTHN_LEVEL_PKT_PRIVACY authentication-level constant. This call matches the server-side call to the RpcServerRegisterAuthInfo function that has the RPC_C_AUTHN_WINNT authentication-level constant.

Because the Windows NT 4.0 Schedule service (Atsvc.exe) does not register a security provider, Atsvc cannot accept the authenticated call. Windows 2000-based computers and Windows Server 2003-based computers that are in untrusted domains cannot accept the authenticated call when your authentication credentials cannot be validated. You try to schedule a job on an untrusted Windows 2000-based computer or on an untrusted Windows Server 2003-based computer from a Windows XP-based computer after you install the KB831003 hotfix.

For additional information about the KB831003 hotfix, click the following article number to view the article in the Microsoft Knowledge Base:

831003 Scheduled tasks that use NTAUTHORITY\SYSTEM do not run correctly





Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
This hotfix requires Windows XP Service Pack 1.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Windows XP, 32-bit versions
<pre class="fixed_text">  Date         Time   Version        Size     File name 07-Jun-2004 17:45  5.1.2600.1539  376,832  Netapi32.dll

Windows XP, 64-bit versions
<pre class="fixed_text">  Date         Time   Version        Size     File name      Platform ---  07-Jun-2004  18:00  5.1.2600.1539  905,728  Netapi32.dll   IA-64 07-Jun-2004 17:45  5.1.2600.1539  376,832  Wnetapi32.dll  x86

<div class="workaround_section">

WORKAROUND
To work around the problem where you cannot schedule a job on an untrusted Windows 2000-based computer or on an untrusted Windows Server 2003-based computer from a Windows XP-based computer after you install the KB831003 hotfix, use one of the following methods.

Method 1
<ol> Type the following command at a command prompt, and then press ENTER:

net use \\ \ipc$ /savecred

</li> When you are prompted, type your user name for the untrusted domain, and then press ENTER.</li> When you are prompted, type your password for the untrusted domain, and then press ENTER.</li> Run the scheduled task by using the at command.</li></ol>

Method 2

 * 1) Click Start, and then click Control Panel.
 * 2) Double-click User Accounts.
 * 3) On the Advanced tab, click Manage Passwords, and then click Add.
 * 4) In the Server box, type the name of the server where you want to run the scheduled task.
 * 5) Type your user name in the User name box, type your password in the Password box, and then click OK.
 * 6) Click Close, and then click OK.
 * 7) Run the scheduled task by using the at command.

<div class="status_section">

STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Microsoft Windows XP Service Pack 2.

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MORE INFORMATION
For more information about the NetScheduleJobAdd function, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/aa370614.aspx

For more information about the RpcServerRegisterAuthInfo function, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/aa378438.aspx

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kberrmsg kbbug kbfix kbqfe kbwinxpsp2fix kbwinxppresp2fix kbhotfixserver KB843250

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