Tenant Federation with hybrid/on-premise mailboxes

Question

Hello,I am trying to federate two O365 Tenants. Tenant 'A' is completely cloud based, Tenant 'B' is currently in a hybrid configuration with mailboxes on-premise.&nbsp;Free busy is working one way, as I can view Free/Busy in tenant 'A' from tenant 'B'.It is not working when viewing mailboxes that reside on premise in tenant 'B', from tenant 'A'.&nbsp;Is this a supported scenario?Or is there any documentation on how to configure and or troubleshoot?Thank you.&nbsp;

nunoariassilva · Answer

Hi Jason,
&nbsp;
You have to federate the free busy from Tenant A to Hybrid EWS Server (on-premises) of Tenant B.
&nbsp;
If you want to view On-premises free/busy you will need to point to the on-premises infrastructure.

vasilmichev · Answer

Read here: https://blogs.msdn.microsoft.com/mvpawardprogram/2014/01/27/calendar-federation-with-an-exchange-hybrid/

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Tenant Federation with hybrid/on-premise mailboxes

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