ecp is no longer accessible after renewing the certificates (MS Exchange and MS Ex Server Auth Certificate) Exchange Server 2016

Bariq Ismael 0 Reputation points

two days a go I renewed the certificates (Microsoft Exchange and Microsoft Exchange Server Auth Certificate) on Exchagne Server 2016. Then something strange happened :( The clients could no longer send and receive emails, and the Exchange Admin Center was no longer accessible.

In IIS Manager I selected the certificates again. After that, the clients could work again. but the problem is, ECP is still unreachable.

Many thanks for any help

Exchange Server
Exchange Server
A family of Microsoft client/server messaging and collaboration software.
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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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2 answers

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  1. Andy David - MVP 138.2K Reputation points MVP

    Did you follow this when you renewed the Microsoft Exchange Certificate?


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  2. Aholic Liang-MSFT 13,731 Reputation points Microsoft Vendor

    Hi @Bariq Ismael ,

    Please refer to this link to check if the OAUTH certificate is configured correctly:

    Can't access OWA/EAC with expired OAuth certificate - Exchange | Microsoft Learn

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