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MARTINEZRommel-9952 asked ZhengqiLou-MSFT commented

Automatic CA certificate renewal feature in M365

Hi, is there a Automatic certificate renewal (CA) feature in M365 Exchange? As we are currently doing manual CA cert renewal as of the moment for our generic mailboxes.

office-exchange-server-administration
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Hi @MARTINEZRommel-9952 ,

To better help you on your issues, would you like to share more information about your question?
Is this a hybrid deployment? And do you mean you wanna renew the certificate for your on-prem Exchange or using for hybrid?

Best regards,
Lou

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Hi Lou,

This is a hybrid deployment. So how will the cert renewal be handled in hybrid deployement?

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ZhengqiLou-MSFT avatar image
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ZhengqiLou-MSFT answered ZhengqiLou-MSFT commented

Hi @MARTINEZRommel-9952 ,

If you want to renew the on-prem server certificate, I think you'll need to do that manually.

Based on the certificate type, you may resubmit the cert request, and download the cert from your CA to complete the request.
This thread may be helpful: https://docs.microsoft.com/en-us/answers/questions/286568/exchange-certificate-renewal-in-hybrid-environment.html

Best regards,
Lou


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Hi Lou,

Once migrated to Exchange online, is there a feature that this cert renewal can be done 'automatically'?

Regards.

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Hi @MARTINEZRommel-9952 ,

Unfortunately no, because you'll still need to submit the certificate request to the commercial CA and upload the approved certificate to your on-prem server.

But if you decommissioned the on-prem server, you'll not need the certificate.

Best regards,
Lou

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Hi @MARTINEZRommel-9952 ,

Do the suggestions above help? If the issue has been resolved, please click “Accept as answer” to mark the helpful reply as an answer, this will make answer searching in the forum easier and be beneficial to other community members as well.

If you are still stuck in this issue, please feel free to post your questions.

Regards,
Lou


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michev answered

Not sure what exactly you are referring to here. "Server" certificates is not something you manage/have access to in Exchange Online, and if you're talking about S/MIME and such, you're in charge of managing the certificates and renewal (nothing in M365 relates to this).

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