DOCUMENT:Q216264  30-SEP-1999  [exchange]
TITLE   :XADM: Non-Delivery Receipts Fail Due to Error 0xfffff9bf
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55 EXC55SP3Fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

When a user requests a delivery receipt on behalf of a mailbox on another server
to which they have been granted delegate rights, the delivery report is not
received and the following error is visible in the Windows NT Event Viewer
Application log without enabling additional logging on the Microsoft Exchange
Information Store:

   Event ID: 2006
   Source: MSExchangeIS Private
   Category: Transport Sending
   Description: The generation of a delivery report or a non-delivery report
   has failed due to error 0xfffff9bf.

CAUSE
=====

Delivery receipt requests were not being properly routed to the Message Transfer
Agent (MTA) to be delivered to the mailbox requesting the delivery receipt.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server
version 5.5. For additional information, please see the following article in the
Microsoft Knowledge Base:

   Q191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or
later:

Component: Information Store

+-------------------------+
| File name  | Version    | 
+-------------------------+
| Gapi32.dll | 5.5.2541.0 | 
+-------------------------+
| Mdbmsg.dll | 5.5.2541.0 | 
+-------------------------+
| Store.exe  | 5.5.2541.0 | 
+-------------------------+


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5. This problem was first corrected in Exchange Server 5.5 Service
Pack 3.

MORE INFORMATION
================

This fix is based upon the Windows NT logon of individual mailboxes and only
works if separate Windows NT account are used in conjunction with the mailbox
and the mailbox granted delegate rights.

The symptoms listed above is one condition where a 2006 Event may be logged.
There may be other conditions where a 2006 Event ID may be logged. If, after you
obtain this fix, the 2006 Events continue, please contact Microsoft Product
Support Services to help diagnose the problem.

Additional query words:

======================================================================
Keywords          : exc55 EXC55SP3Fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

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