Microsoft KB Archive/247774

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Knowledge Base

PSS ID Number: 247774

Article Last Modified on 11/5/2003

The information in this article applies to:

  • Microsoft Exchange Server 5.5

This article was previously published under Q247774


When you use an antivirus program on a computer running Microsoft Windows NT Server 4.0 Service Pack 3 and Microsoft Exchange Server 5.5, the following error message may appear in the application log of Event Viewer:

Event ID: 0
Source: ESE97
Category: Performance
Description: MSExchangeIS (306) Unexpected Windows NT API error. 0xC000000D


This behavior can be caused by a virus protection program, especially when it is not a program built to recognize Exchange Server processes. The program may install a file system filter that prevents a JET engine from addressing database files.


To work around this behavior, use one of the two following procedures:

  • Remove the antivirus software, and then restart the server. (Disabling the antivirus program is not sufficient.)


  • Install a Windows NT hotfix that is part of the roll-up hotfixes recommended in the Readme.doc file for Microsoft Exchange Server 5.5. These hotfixes are available at: NOTE: If you later reinstall Windows NT service packs, you must also reinstall the hotfixes, regardless of your responses to the Overwrite Newer Files prompts during the service pack installation.


This error can occur when you install Norton NT Tools version 1.0. Disabling the Norton program does not work; you must remove it.

Use of Omtool Fax Senior version 2.5 also produces this error, with an internal ID of 2030148. The hotfix noted above also corrects this problem.

For additional information, please see the following article in the Microsoft Knowledge Base:

174746 XADM: Err Msg: Unexpected NT API Error: 0xC000000D

Keywords: kbprb KB247774
Technology: kbExchange550 kbExchangeSearch kbZNotKeyword2