We have 2 domains abc.Inc and Now the Calendar of abc.Inc. users not visible by

Please advise.

Thank you in Advance.
Moin AhmedSenior System AdministratorAsked:
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Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
Do you have any trust relationship between .inc and .com? if the answer is no, start there.
Valentina PerezExchange ServersCommented:
Hi Moin,

You need to configured organizational relationship and synchronize all directories.


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Moin AhmedSenior System AdministratorAuthor Commented:
it is free/busy that does not work. Exchange 2016 users can see free/busy for 2010 users, issue is when Exchange 2010 users cannot see free/busy for Exchange 2016 users.
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Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
And that is supposed to guess that from the question? it's quite hard to guess when there's absolutely no reference to free/busy information in your question. If that's the issue you need to configure the Sharing of the free/busy information between domains, here's an example between an O365 domain and 1 onpremises.

Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
Moin AhmedSenior System AdministratorAuthor Commented:
Issue was with the GAL sync service.
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