DOCUMENT:Q250500 10-MAY-2001 [exchange] TITLE :XADM: Sybari Antigen Software Interaction with Exchange Server PRODUCT :Microsoft Exchange PROD/VER::5.5 OPER/SYS: KEYWORDS:exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 - Microsoft Exchange 2000 Server - Microsoft Exchange 2000 Enterprise Server ------------------------------------------------------------------------------- SUMMARY ======= This article provides Microsoft Product Support Services (PSS) with information about how Sybari Antigen software interacts with Exchange Server and Antigen software support boundaries. MORE INFORMATION ================ Sybari has released Antigen software for Exchange Server 5.5, Exchange 2000 Server, and Exchange 2000 Enterprise Server. Antigen is a unique virus-scanning program, and it is important for Microsoft Support Professionals to understand the way that Antigen software works and what the Microsoft position is on this product. How Antigen Works ----------------- Sybari uses unsupported interfaces between the information store and the Extensible Storage Engine (ESE). At the time of the publication of this article no instances of corruption have been reported, but customers who use Antigen run the risk of database corruption and potential data loss if there are errors in Sybari Antigen implementation. During installation, Antigen changes the Exchange Server Information Store service so that it is dependent on the Sybari Antigen service. This ensures that the Antigen service starts before the Exchange Server Information Store service starts. During the startup process, the Antigen service checks for appropriate versions of Antigen and Exchange Server, and appropriate file versions. If any incompatibility is found, Antigen disables itself, enables the information store to start (without antivirus protection), and notifies administrators. When Antigen starts successfully, the Microsoft version of the Ese.dll file is temporarily renamed to Xese.dll and the Sybari version of the Ese.dll file is put in its place. After the Sybari version of the Ese.dll file is loaded, the Microsoft version is renamed back to Ese.dll and the Exchange Server information store is enabled to complete its startup process. The Microsoft Position on Sybari Antigen ---------------------------------------- Based upon research on Sybari Antigen and the proven track record of the product, Microsoft acknowledges that this product is an innovative solution to meet the antivirus needs of customers. Customers who contact Microsoft Product Support Services may be asked to disable the Sybari Antigen service to help identify issues, but customers are free to re-enable the software after the root cause of the issue is properly diagnosed. Microsoft and Sybari agree that this is a valid troubleshooting step to determine the cause of issues. To make this process as simple as possible, Sybari includes a command-line utility with Antigen, the Antutil.exe utility, that enables customers to quickly disable (/disable) and enable (/enable) the Antigen service without removing the software. By default, a copy of this file is installed in the following folder: Program Files\Sybari Software\Antigen for Exchange If a potential issue exists with the Sybari Antigen software or if Sybari Antigen may be contributing to an issue, Sybari requests that you include Sybari Technical Support (631-630-8500) in the discussions to resolve the issue, so that Sybari can help identify the cause of the issue. If, after the customer disables Antigen, the issue persists, the customer may re-enable Antigen. The third-party contact information included in this article is provided to help you find the technical support you need. This contact information is subject to change without notice. Microsoft in no way guarantees the accuracy of this third-party contact information. The third-party products discussed in this article are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability. Additional query words: ese dll xese antutil exe ====================================================================== Keywords : exc55 Technology : kbExchangeSearch kbExchange550 kbZNotKeyword2 kbExchange2000Search kbExchange2000Serv kbExchange2000EntServ Version : :5.5 Issue type : kbinfo ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.