[Migrated from MSDN Exchange Dev] Microsoft Hybrid Agent or Full Hybrid for non-Internet-facing site

Joyce Shen - MSFT 16,666 Reputation points
2020-11-25T02:55:39.207+00:00

[Note] This thread was originally posted on MSDN. As the MSDN Exchange Dev forum mainly focuses on developing issues and the TechNet Exchange forums for general questions have been locked down, we manually migrated this one to Microsoft Q&A platform to continue the troubleshooting.

[MSDN thread link] Microsoft Hybrid Agent or Full Hybrid for non-Internet-facing site

Hello, some on our Exchnage Servers are located in non-Internet-facing sites . I'm wondering on design for such a topology, cause if I will set up full hybrid and organizational relationships with the cloud, then any server from the organization would be able to use it to send free/busy requests to the cloud.

Hence, the question raises, how a mailbox on the server in non-Internet-facing site will lookup free/busy request for O365 mailbox? Would it fail then?

P.S. I'm running 2010s now and we are going to introduce 2016 Hybrid servers.

Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
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  1. Joyce Shen - MSFT 16,666 Reputation points
    2020-11-25T02:58:29.873+00:00

    Hi,

    It should work when mailbox in non-Internet-facing site lookup free/busy request for o365 mailbox, the request will be proxied to the Internet-facing site to Exchange online.

    On the contrary, for the issue Exchange Online users cannot access free/busy information of users in a non-Internet-facing Active Directory site, we will need to Export the federation certificates from the Internet-facing Exchange servers, and then import them to the non–Internet-facing Exchange servers.

    Detailed information introduced in the KB.

    And the Detailed process can be seen here: Demystifying Hybrid Free/Busy: what are the moving parts?

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  1. Half One 1 Reputation point
    2020-11-25T03:14:45.117+00:00

    Thanks for your help, you can close this topic now.
    Take care!

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