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XCCC: Cannot Transfer Files to Instant Messaging Contact

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Symptoms

When you try to send a file to an Exchange 2000 Instant Messaging contact, you may receive the following error message:
We could not send this file because the connection is blocked. Please contact your network administrator or Internet service provider; they may be able to enable file transfers.

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Cause

This issue may occur if you try to send a file to an Instant Messaging contact that has been added by using their User Principal Name (UPN). For example:

alias of the user@domain in which the user resides.com


To send files successfully to an Instant Messaging contact, you must specify the host name of the Instant Messaging server when you add the contact.

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Resolution

To resolve this issue, delete the Instant Messaging contact, and then add the Instant Messaging contact by using the following format:

alias of the contact@host name of the Exchange 2000 Instant Messaging server.name of the Active Directory domain.com

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More information

For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
278974 Troubleshooting authentication failures in Instant Messaging
319758 XCCC: Exchange 2000 Server Instant Messaging authentication does not succeed
266754 XADM: How to configure Instant Messaging logging
285131 XCCC: How to verify an RVP record with Nslookup

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Keywords: KB810157, kbprb, kbrtc, kberrmsg

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Article Info
Article ID : 810157
Revision : 5
Created on : 2/28/2007
Published on : 2/28/2007
Exists online : False
Views : 193