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

ITSUPPORT 1 Reputation point
2022-10-17T07:16:53.5+00:00

250947-error.jpg

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.
7,381 questions
0 comments No comments
{count} votes

1 answer

Sort by: Most helpful
  1. Joyce Shen - MSFT 16,646 Reputation points
    2022-10-18T02:04:54.343+00:00

    Hi @ITSUPPORT

    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
    251385-image.png

    And more information about sharing in on-prem Exchange server, which applied to Exchange 2016 as well: https://learn.microsoft.com/en-us/exchange/sharing-exchange-2013-help?source=recommendations


    If an Answer is helpful, please click "Accept Answer" and upvote it.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.