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You fail to configure federation in an Exchange Server 2010 SP2-based hybrid environment

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Symptom

When you use Hybrid Setup Wizard to configure federation in an Exchange Server 2010 SP2-based hybrid environment, the wizard could not complete and you receive the following error message:

 

Set-FederatedOrganizationIdentifier

Failed

Error:

Unable to reserve domain "FYDIBOHF25SPDLT.exchangedelegation.<your domain>" for Application Identifier "<XXXX>". Detailed information: " Windows Live returned a domain reservation error. Detailed information: "DomainUnavailable: The specified domain is not available.".

 

Exchange Management Shell command attempted:

Set-FederatedOrganizationIdentifier -DelegationFederationTrust 'Microsoft Federation Gateway' -AccountNamespace 'exchangedelegation.<your domain>' -OrganizationContact '' -Enabled $true

 

Therefore, on-premises users cannot view free/busy information of cloud users, and vice versa.

 

Cause

The issue occurs because the exchangedelegation domain is incorrectly added when creating federation trust in Exchange Server 2010 SP2-based hybrid environment. The incorrect Federation Trust and Organization Relationship prevent free/busy information from sharing.

 

 

Resolution

To resolve the issue, manually correct the Federation Trust and Organization Relationship settings by running the following cmdlet to add the Primary SMTP Domain:

Set-FederatedOrganizationIdentifier -DelegationFederationTrust 'Microsoft Federation Gateway' -AccountNamespace '<your domain>' -Enabled $true

 

More Information

Exchange Hybrid Deployment Configuration Tips: Sharing Free/Busy Information

https://community.office365.com/en-us/w/exchange/532.aspx

 

Set-FederatedOrganizationIdentifier

https://technet.microsoft.com/en-us/library/dd351037.aspx

 

Create a Federation Trust

https://technet.microsoft.com/en-us/library/dd335198.aspx

 

Applies To

Exchange hybrid configuration