Microsoft KB Archive/170633

= XWEB: Requirements For Internet Explorer File Attachment Support =

Article ID: 170633

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Active Server Components 5.0
 * Microsoft Outlook Web Access 5.5

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This article was previously published under Q170633



SYMPTOMS
When you use the Microsoft Outlook Web Access (OWA) client in Microsoft Internet Explorer or Netscape Navigator, you may receive the following error message while attempting to add an attachment to a new mail message:

Internet Explorer cannot open the Internet Site

HTTP:///Exchange/exupload.dll.

The server returned an invalid or unrecognized response.



CAUSE
The following requirements must be met in order for Microsoft Internet Explorer 3.0x for Windows to allow the ability to add file attachments to mail messages:


 * 1) Internet Explorer for Windows, version 3.02 or higher.
 * 2) Internet Explorer 3.02 File Upload Add-on for Windows 95 and Windows NT (RFC1867.EXE) installed on the client computer.

NOTE: This add-on only needs to be applied to the Windows versions of the browser.

For Internet Explorer for Macintosh, you must be running version 3.01a or higher. For Netscape Navigator, you must be running 3.02 or higher.



MORE INFORMATION
For more information about the File Upload Add-on for Internet Explorer, please read the Readme.txt file located on the Microsoft Exchange Server 5.0 SP1 CD or in the following Microsoft Knowledge Base article:

154481 Readme.txt: Microsoft Exchange version 5.0 Service Pack

Additional query words: Attachments IE Fail rfc1867.exe

Keywords: kbprb KB170633

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