DOCUMENT:Q242900 08-MAY-2002 [exchange] TITLE :XWEB: HTTP/1.0 Server Error Message When You Attach Files in OWA PRODUCT :Microsoft Exchange PROD/VER::5,5.5 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Outlook Web Access, version 5.5 Service Packs 1, 2, 3 - Microsoft Internet Explorer version 5 for Windows 95 - Microsoft Internet Explorer version 5 for Windows 98 - Microsoft Internet Explorer version 5 for Windows NT 4.0 - Microsoft Exchange Server, version 5.5 ------------------------------------------------------------------------------- SYMPTOMS ======== When you attempt to attach a file to a new message in Outlook Web Access (OWA), you may receive the following error message: HTTP/1.0 500 Server Error (A dynamic link library (DLL) initialization routine failed.) The only option available is to close the dialog box, which cancels the message you are attempting to send. After this occurs, the following error appears in the application event log on the Exchange Server computer: Event ID: 19 Source W3SVC Type: Error Category: None Description: The HTTP server was unable to load the ISAPI application 'c:\exchsrvr\webdata\exupload.dll'. The data is the error. CAUSE ===== This error is caused by registry restrictions that prevent guest access; it occurs when OWA is using Internet Explorer 5. This error occurs if the following registry key is enabled with a value of 1: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Eventlog\Application\RestrictGuestAccess This registry key prevents guests or anonymous users from viewing event logs on the server. RESOLUTION ========== A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Internet Explorer 5 service pack that contains this fix. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: Date Time Version Size File name Platform -------------------------------------------------------------------- 6/18/1999 7:08:33PM 5.00.2614.3300 459,024 Wininet.dll x86 STATUS ====== Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article. MORE INFORMATION ================ For additional information, click the article number below to view the article in the Microsoft Knowledge Base: Q235513 Internet Explorer 5 Cannot Attach File into OWA Message Additional query words: ====================================================================== Keywords : Technology : kbOutlookSearch kbIEsearch kbExchangeSearch kbExchange550 kbZNotKeyword2 kbOWASearch kbIENT400Search kbIE95Search kbIE500Search kbZNotKeyword3 kbIE98Search kbOWA550SP1 kbOWA550SP2 kbOWA550SP3 kbIE500Win95 kbIE500Win98 kbIE500WinNT400 Version : :5,5.5 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 2002.