Expired Microsoft exchange server auth certificate in hybrid setup

Filip Soogen 171 Reputation points
2020-12-11T14:21:39.383+00:00

Hi ,

I have a customer who's Microsoft Exchange Server Auth Certificate is expired.
The procedure to renew is pretty straightforward : http://byronwright.blogspot.com/2018/05/expired-microsoft-exchange-server-auth.html
But my question is : do i need to change something on Office365/Exchange Online ?
i can read in the comments that you need to export this certificate and upload it to Azure.
Or is running the hybrid wizard again an option ?
Please advise ...

thanks!
Filip

Exchange Online
Exchange Online
A Microsoft email and calendaring hosted service.
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Accepted answer
  1. Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
    2020-12-14T13:47:38.52+00:00
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  1. Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
    2020-12-11T14:28:37.11+00:00

    I would re-run the Hybrid Wizard. Doing that should take care of things

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  2. KyleXu-MSFT 26,396 Reputation points
    2020-12-14T07:15:46.793+00:00

    @Filip Soogen

    Here are the detailed information about the function of this certificate:
    47892-qa-kyle-15-13-12.png

    So, the best practice is to re-run HCW after renewing this certificate.


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  3. Filip Soogen 171 Reputation points
    2020-12-14T08:25:49.637+00:00

    what happens if mail flow is still going onprem and all mailboxes are in the cloud so all mails go through the connector to O365 and this certificate is expired ?


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