Lost Exchange connection to ECP and Admin Center

Rick Danforth 96 Reputation points
2021-09-08T17:53:06.227+00:00

We have one single Hybrid 2016 server on our domain.

We were renewing the wildcard certificate it uses, and suddenly it rebooted. When it came back up, we got the attached errors for both the Shell and the Admin Center. There are no other Exchange servers for me to connect to on site.

Anything I would normally try requires access to one of these to work. Does anyone have any advice on how to get his back up and running? Thank you in advance,130326-image001.png130327-thumbnail-image002.png130351-thumbnail-image003.png

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.
7,480 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.
1,985 questions
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  1. Andy David - MVP 144.7K Reputation points MVP
    2021-09-08T18:02:00.123+00:00

    Is your OAuth Cert expired?
    https://learn.microsoft.com/en-us/answers/questions/476090/ex2019-cu10-owaecp-not-working-after-july-security.html

    If you cant use remote powershell to fix, try using the snap-in from a regular powershell window. be careful, its not technically supported:

    Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn

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