DOCUMENT:Q271591 01-JUN-2001 [exchange] TITLE :XFOR: Virus Scan Software Interferes with Message Delivery PRODUCT :Microsoft Exchange PROD/VER::5.5 SP3 OPER/SYS: KEYWORDS:exc55sp3 kbExchange550preSP4fix kbExchange550sp4Fix kbgraphxlinkcritical ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 SP3 ------------------------------------------------------------------------------- SYMPTOMS ======== When third-party antivirus programs that use the Exchange Antivirus API are running on a server with the Internet Mail Service, messages with large attachments or compression percentage are directed to the Internet Mail Service virtual Bad folder. This behavior most frequently occurs when multiple Internet Mail Service servers exist within the same Exchange Server site. CAUSE ===== The ecVirusScanInProgress return code is being checked only once. If Exchange Server gets the return code again when the information store retries to open the same attachment, the return code is mapped to Mapi_call_failed, which causes the Internet Mail Service to move the mail to the Bad folder. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, please see the following article in the Microsoft Knowledge Base: Q191914 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack The following files are available for download from the Microsoft Download Center: x86: DownloadDownload Q248838engi.exe now (http://www.microsoft.com/downloads/release.asp?ReleaseID=25443) Alpha: DownloadDownload Q248838enga.exe now (http://www.microsoft.com/downloads/release.asp?ReleaseID=25444) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file. STATUS ====== Microsoft has confirmed this to be a problem in Microsoft Exchange Server, 5.5 Service Pack 3 (SP3). This problem was first corrected in Exchange Server 5.5 Service Pack 4. Additional query words: VAPI ====================================================================== Keywords : exc55sp3 kbExchange550preSP4fix kbExchange550sp4Fix kbgraphxlinkcritical Technology : kbExchangeSearch kbZNotKeyword2 kbExchange550SP3 Version : :5.5 SP3 Issue type : kbbug Solution Type : kbfix ============================================================================= 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.