"The signup domain 'org' derived from '<TenantDomainName>.org' is not a valid domain" error message when you use the Hybrid Configuration wizard in an Exchange Server 2010 environment

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Article ID: 2760999 - View products that this article applies to.
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Symptoms

Assume that you try to configure a Microsoft Office 365 and Microsoft Exchange Server 2010 hybrid environment for Outlook Live users in a Microsoft Exchange Server 2010 environment. To do this, you use the Hybrid Configuration wizard. Additionally, the domain names of the Outlook Live users use the following format:
TenantDomainName.org

In this situation, you cannot configure the hybrid environment, and you receive the following error message:
The signup domain 'org' derived from 'TenantDomainName.org' is not a valid domain.

Cause

This issue occurs because the Hybrid Configuration wizard assumes that the domain names of the Outlook Live users use the following format:

TenantDomainName.onmicrosoft.com

Resolution

To resolve this issue, install the following update rollup:
2746164 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 2

Status

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

More information

For more information about the Hybrid Configuration wizard, go to the following Microsoft website:
Understanding the Hybrid Configuration wizard

Properties

Article ID: 2760999 - Last Review: February 12, 2013 - Revision: 1.0
Applies to
  • Microsoft Exchange Server 2010 Service Pack 2, when used with:
    • Microsoft Exchange Server 2010 Enterprise
    • Microsoft Exchange Server 2010 Standard
Keywords: 
kbqfe kbfix kbsurveynew kbexpertiseinter KB2760999

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