Unable to see Free Busy through Exchange Federation

You receive following error while fetching free Busy for another Federated Organization and get following error from Exchange On-perm servers. [PS] C:\>Test-FederationTrust RunspaceId : 49c3c312-1a26-4cd8-a14d-59d736458f76 Id         : FederationTrustConfiguration Type       : Success Message    : FederationTrust object in ActiveDirectory is valid.  RunspaceId : 49c3c312-1a26-4cd8-a14d-59d736458f76 Id         : FederationMetadata Type       : Error Message    : Unable to retrieve federation metadata…

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