Posts Tagged 'Federation'

Exchange Hybrid – Free/Busy not working between OnPrem and Office365


More than one of our customer opened tickets reporting that Free/Busy lookup between Cloud users and OnPrem Users has stopped working.
After checking the standard settings like autodiscovery, ews services, etc. is seems that this issue was related to the delegation trust and the token validation, maybe due some Microsoft “operations” or issues on their federation services.

In order to test this:

[PS] C:\Windows\system32>Test-FederationTrust -UserIdentity


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Lync 2013 and Skype federation – How-to

One of the most frequent questions by our customers is how to federate Lync and Skype: now it’s possible and we will see how to configure and use this new nice feature.

The prerequisites are:

  • Lync server 2010 or 2013 (works also with OCS 2007R2)
  • Edge Server with public trusted certificates

There are some easy configuration steps to perform:

Request Lync Public IM Federation

Browse to, sign-in with your LiveID, provide your Microsoft Partner ID, Volume License contract or SPLA Agreement Nr and initiate ...

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Exchange 2010 SP2 – hybrid Coexistence wizard – Federation Trust creation fails

I was unable to complete the HCW (Hybrid Coexistence Wizard) on our Exchange 2010 SP2  in order to configure a Hybrid Exchange 2010 Deployment.

Federation Services, TXT records on DNS and so on seems to be correct.

The Command (built by the Coexistence Wizard):

Set-FederatedOrganizationIdentifier -DelegationFederationTrust ‘Microsoft Federation Gateway’ -AccountNamespace ‘’ -OrganizationContact ” -Enabled $true

returns this error message:


An error occurred while attempting to provision Exchange to the Partner STS. Detailed Information “An unexpected result was ...

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