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Notice

This update is no longer available. To fix the issues that are described in this article, install the latest Microsoft Exchange Server update from the following Microsoft Learn article:

Exchange Server build numbers and release dates

Microsoft provides download files only for N-2 versions for an Exchange Server cumulative update (CU), where "N" is the latest CU. The latest CU can be used to recover servers that are running Exchange Server. This includes servers that have a previous CU installed.

Symptoms

Consider the following scenario:
 

  • You configure a federation trust by using the Microsoft Federation Gateway.

  • You create an Organization relationship with another organization.

  • Your organization is a mixed organization that contains both Exchange Server 2010 and Exchange Server 2003.

  • A user on an Exchange Server 2003 server looks up the Free/Busy information of a remote user in the other organization.


In this scenario, hash marks are displayed instead of the Free/Busy information.

Cause

When an Exchange 2003 user who uses any version of Outlook performs an availability request for a remote user, the target organization may return the Free/Busy information in the format of a MergedOnly string, and Outlook will display hash marks (no information) for the remote user.

Status

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

More Information

A separate issue with Exchange 2003 Cross-Org lookups was identified that is caused by the Autodiscover feature failing for the remote user. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

2506820 The free/busy information does not display of a remote user whose mailbox is located on an Exchange Server 2003 server

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