Exchange Delegation Federation Certificate Expired

Ryan Kohn 1 Reputation point

We have a Federation Certificate that has expired on Sept 8th, 2021. I'm assuming if it expired, something would be broke? But, I, nor anyone else has seen any issues or reported any. Is there another certificate that it may possibly be using? From what I understand, this is for calendar free/busy. This was all set up by an employee who is not with us anymore and when we switched to Hybrid environment. Also, when going through Microsoft documentation on renewing an expired certificate, it says that one has to remove the trust and add it back. Isn't it possible to just add a new cert and assign the federation service to it? Sorry for the questions, but I am kind of lost. Thank you for any help! Much appreciated!

Ryan Kohn135651-27-09-2021-12-42-certificates-microsoft-exchange.jpg

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. Tasadduq Burney 7,506 Reputation points MVP

    Hello @Ryan Kohn !

    Hope you are having a great day!

    Thank you for asking a Question! We are Glad to Assist you!.

    If the federation certificate has already expired, you need to remove all federated domains from the federation trust, and then remove and recreate the federation trust.
    I am afraid, in your situation you will have to remove it and get it repalced.

    Please go through the link mentioned below inorder to remove a federation trust.

    After you have removed the Federation Trust, Visit the link mentioned below which explains how to renew the Federation Certificate :-

    Let me know if the above solution resolved your issue!

    Tasadduq Burney


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