Getting Error after login OWA/ECP/EAC Exchange 2016 hybrid

hafizuddin shahipurullah 1 Reputation point
2022-11-24T09:30:20.2+00:00

hi,

I getting a problem after login in to owa/ecp/eac. previously we has update the exchange 2016 to KB5004779. try to revert the update but the same error happens again. try check cert there are no changes.

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Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
2,370 questions
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,886 questions

3 answers

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  1. Joy Zhang-MSFT 1,046 Reputation points
    2022-11-25T07:31:12.467+00:00

    Hi @hafizuddin shahipurullah ,

    Since the limited information on your issue, we want to confirm something with you for further troubleshooting:

    Could you see below events information is recorded in the Application log? Event ID: 2004 or Event ID: 1309?

    If you can see above event IDs in application log, it indicates that the Exchange server Auth certificate that's used for OAuth signing is missing from the Exchange server. You could run the following command to check whether the certificate is missing: 

    Get-ExchangeCertificate (Get-AuthConfig).CurrentCertificateThumbprint

    To fix the issue, follow the guidance and check if this workaround works for you.

    If an Answer is helpful, please click "Accept Answer" and upvote it. If you have extra questions about this answer, please click "Comment".
    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.

  2. Amit Singh 4,846 Reputation points
    2022-11-25T11:26:46.59+00:00

    It looks like it's listed as a known issue on the Exchange blog, which I didn't see the first time
    https://techcommunity.microsoft.com/t5/exchange-team-blog/released-november-2021-exchange-server-security-updates/ba-p/2933169/highlight/true/page/3"
    "11/11: Added a known issue with OWA redirect for hybrid customers."

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  3. SABBIR AHMED KHAN 1 Reputation point
    2022-11-28T09:10:23.133+00:00

    It is also possible to experience HTTP ERROR 500 after logging in to EAC or ECP due to incorrect or outdated server configuration after the server upgrade or update.

    To resolve this error, run UpdateConfigFiles.ps1 and UpdateCAS.ps1 PowerShell scripts located in the Exchange Server Bin directory (C:/Program Files/Microsoft/Exchange Server/V15/Bin/).

    Follow these steps to execute these PowerShell scripts:

    To navigate the Exchange 'Bin' directory, open PowerShell as an administrator and use the 'cd' command. As an example,

    "C:/Program Files/Microsoft/Exchange Server/V15/Bin."

    Run the following PowerShell scripts to fix the configuration issues.

    The UpdateConfigFiles.ps1 script

    .\UpdateCAS.ps1

    It may take a while for this to finish. Check if the HTTP 500 error has been resolved and ECP/EAC is accessible after restarting the server.

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