XWEB: HTTP/1.0 Server Error Message When You Attach Files in Outlook Web Access

ID: Q242900

The information in this article applies to:

Microsoft Outlook Web Access, version 5.5 Service Packs 1, 2
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

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 that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific 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 on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

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 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 :
Version : WINDOWS:5,5.5
Platform : WINDOWS
Issue type : kbbug