On-premises users can't view free/busy information of Exchange Online users after you set up an organization relationship

Note The Hybrid Configuration wizard that's included in the Exchange Management Console in Microsoft Exchange Server 2010 is no longer supported. Therefore, you should no longer use the old Hybrid Configuration wizard. Instead, use the Office 365 Hybrid Configuration wizard that's available at http://aka.ms/HybridWizard. For more information, see Office 365 Hybrid Configuration wizard for Exchange 2010.
PROBLEM
You set up an organization relationship between your Exchange Online organization in Office 365 and an on-premises Exchange organization that's running Microsoft Exchange Server 2010. However, on-premises users can't view the free/busy information of cloud users. Additionally, you experience the following symptoms:
  • When you run the test-Organizationrelationship cmdlet from the Exchange Server 2010 server, you receive the following error message:
    The request failed with HTTP status 404: Not Found.
  • If Outlook logging is enabled, the following error is logged when an on-premises user tries to view the free/busy information of a cloud user:
    An exception System.Net.WebException: The request failed with HTTP status 404: Not Found.&#xD
CAUSE
This behavior is by design. For on-premises users and cloud users to share free/busy information with one another, you must be running Exchange Server 2010 Service Pack 3 (SP3) or a later version.

This is a known requirement for hybrid deployments. However, this is also a requirement if you set up a relationship between your Exchange Online organization in Office 365 and another organization.
SOLUTION
Install Update Rollup 2 or later for Exchange 2010 SP3 in the on-premises environment.
MORE INFORMATION
For more info about the latest updates for Exchange 2010, see Exchange Server Updates: build numbers and release dates.

Still need help? Go to the Office 365 Community website or the Exchange TechNet Forums.
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Article ID: 2896834 - Last Review: 05/10/2016 09:35:00 - Revision: 8.0

Microsoft Exchange Online, Microsoft Exchange Server 2010 Enterprise, Microsoft Exchange Server 2010 Standard

  • o365e o365m o365022013 o365 o365a KB2896834
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