Microsoft KB Archive/892450

= You receive a &quot;The messaging interface has returned an unknown error &quot; error message when you try to use Outlook to make a change to a recurring appointment in the Calendar of your Hotmail account or of your MSN e-mail account =

Article ID: 892450

Article Last Modified on 1/12/2005

-

APPLIES TO


 * Microsoft Office Outlook Connector
 * Microsoft Office Outlook 2003
 * Microsoft Outlook 2002 Standard Edition
 * MSN 9.2 Premium Internet Software
 * Microsoft Office Outlook Live

-



SYMPTOMS
When you try to use Microsoft Outlook to make a change to a recurring appointment in the Calendar of your Hotmail account or of your MSN e-mail account, you receive the following error message:

The messaging interface has returned an unknown error. If the problem persists, restart Outlook.

If you try again to make the change to the recurring appointment, you then receive the following error message:

This item is no longer valid because it has been closed.

Additionally, if you close the appointment and do not save the change, the change appears in the Calendar of your Hotmail account or of your MSN e-mail account in Outlook. However, the change does not appear in the Calendar when you use your Web browser to open your Hotmail account or your MSN e-mail account.



CAUSE
This issue occurs when you try to make a change to a single occurrence of a recurring appointment. This issue does not occur if you make the change to all occurrences of a recurring appointment.



MORE INFORMATION
When only one occurrence of a recurring appointment in the calendar is changed, the change is referred to as an &quot;exception.&quot; Exceptions are not supported in the current version (1.5) of the Microsoft Office Outlook Connector. Although the change is reflected in the Calendar view in Outlook, the change is not sent to the Hotmail e-mail server or to the MSN e-mail server.

Note This problem does not occur when you use a Microsoft Exchange Server account. This issue is limited to Hotmail accounts and to MSN accounts.

Additional query words: outlook2003 outlook2002 ol2003 ol2002 ol2k3 ol2k2 connector appointment recurrence modify messaging interface restart

Keywords: kberrmsg kbtshoot kbprb kbcalendar KB892450

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.