A meeting update message or a meeting cancellation message from an Exchange 2003 user is not delivered to an Exchange 2007 user


Consider the following scenario. A Microsoft Exchange Server 2003 organization and a Microsoft Exchange Server 2007 organization exchange communications by using SMTP. An Exchange 2003 user organizes a meeting and then sends a meeting request to an Exchange 2007 user. Additionally, the Exchange 2007 user accepts the meeting request. Then, the meeting organizer uses Microsoft Office Outlook to send a meeting update message or a meeting cancellation message to the Exchange 2007 user.

In this scenario, the meeting update message or the meeting cancellation message is not delivered to the Exchange 2007 user. Instead, the meeting update message or the meeting cancellation message goes into the SMTP retry queue. If an administrator tries to open the message in the Exchange System Manager console, the administrator may receive the following error message:
Unable to open for delivery
Additionally, if the diagnostics logging of the MSExchangeTransport component is set to maximum, the following warning is logged: After some time, the sender of the meeting update may receive the following NDR:
Your message did not reach some or all of the intended recipients.
Subject: test message
Sent: 8/20/2008 11:44 AM
The following recipient(s) could not be reached:
user@domain.com on 8/20/2008 11:34 PM
Could not deliver the message in the time limit specified. Please retry or contact your administrator. <server.domain.com #4.4.7>


When an Exchange 2007 user accepts a meeting request from an Exchange 2003 user, the X-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE attribute is missed. In the Outlook 2007 client, if the X-MICROSOFT-CDO-ATTENDEE- CRITICAL-CHANGE attribute is missing, the PR_RECIPIENT_TRACKSTATUS_TIME property is set to "1/1/1601 00:00:00 AM." When the Exchange 2003 user tries to send an update of the meeting request or a cancellation of the meeting request, the value of the PR_RECIPIENT_TRACKSTATUS_TIME property cannot be successfully converted from the MAPI format to the MIME format by using the VariantTimeToSystemTime function.


After you install the hotfix, you must create the FixRecipientTrackStatusTime registery entry to enable the hotfix.To have us activate the hotfix for you , go to the "Fix it for me" section. If you prefer to activate the hotfix yourself, go to the "Let me fix it myself" section.

Fix it for me

To activate the hotfix automatically, which will set the FixRecipientTrackStatusTime registry value to 1, click the Fix this problem link. Then, click Run in the File Download dialog box and follow the steps in this wizard.

Note this Fix it solution works for all languages. However, for some languages, the wizard text may be in English

Note if you are not on the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.

Let me fix it myself

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows

After you install the hotfix, you must create the FixRecipientTrackStatusTime register entry to enable the hotfix. To activate the hotfix yourself, follow these steps:
  1. Click Start, click Run, type Regedit, and then click OK.
  2. Locate the following registry subkey:
  3. On the Edit menu, point to
    New, and then click DWORD Value.
  4. In the details pane, type
    FixRecipientTrackStatusTime for the new value, and then press ENTER.
  5. Right-click FixRecipientTrackStatusTime, and then click Modify.
  6. In the Edit DWORD Value dialog box, click
    Decimal under Base.
  7. In the Value data box, type
    1, and then click OK.
  8. Exit Registry Editor.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Note This hotfix is also known to resolve the following error message that IMAP clients receive when the PR_RECIPIENT_TRACKSTATUS_TIME MAPI property is blank on the affected message:

Header download for the 'FOLDERNAME' folder did not complete. Could not download new messages from the IMAP server. Account: 'ACCOUNT', Server: 'SERVER', Protocol: IMAP, Server Response: 'The requested message could not be converted to an RFC-822 compatible format.', Port: 143, Secure(SSL): No, Error Number: 0x800CCCD2


Microsoft Exchange Server 2003 Service Pack 2 (SP2) must be installed before you apply this hotfix.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the following services are automatically restarted when you apply this hotfix:
  • The Microsoft Exchange System Attendant service
  • The Internet Information Services (IIS) Admin Service and all dependent services

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File nameFile versionFile sizeDateTime
Note After you install this hotfix, messages will be sent and received correctly. However, Outlook may incorrectly display the following text:
The attendee sent another response after this response.
This occurs because Exchange 2003 is forced to make a best-effort calculation on what the value for PR_RECIPIENT_TRACKSTATUS_TIME should be because Exchange 2007 does not propagate it back to Exchange 2003.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Article ID: 938650 - Last Review: Jun 21, 2014 - Revision: 1

Microsoft Exchange Server 2003 Enterprise Edition, Microsoft Exchange Server 2003 Standard Edition