Exchange2016 requires to share calendar to users of an external organization but reports an error when enabling federated authentication trust

ITSUPPORT 1 Reputation point


Two-way trust is established between the two domains, and have been added the TXT DNS

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Joyce Shen - MSFT 16,646 Reputation points


    Take a reference at the methods discussed in this similar thread: Exchange Server Federation Error

    Make sure TLS1.2 is enabled for your on-prem server, detailed steps here: Enabling TLS 1.2 and Identifying Clients Not Using It

    And more information about sharing in on-prem Exchange server, which applied to Exchange 2016 as well:

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