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self signed certs questions RRS feed

  • Question

  • have two exchange servers in DAG group.

    just got notification that the self signed cert on both was going to expire in couple of days, it is assigned to SMTP.

    have a 3rd party cert that is assigned to imap, pop, smtp, iis.

    self signed cert seems to have same thumbprint and serial on both exchange servers.

    so do I renew the self signed on server 1, and then export to server 2, or renew on both?

    seems like I have a vague memory of having an issue with the DAG due to the self signed certs, could that cause an issue?

    FWIW - I am currently in Hybrid mode with 365, about 80% people moved, soon as they all are, will just keep exchange so we can manage mail and users.

    Tuesday, December 10, 2019 8:17 PM

All replies

  • Is it the exchange certificate? if so you can just run the command new-certificate

    Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    • Proposed as answer by Perry_Pan Wednesday, December 11, 2019 7:47 AM
    Wednesday, December 11, 2019 5:20 AM
    Moderator
  • For self-signed certificate, you can renew it on both servers. Use following command:

    Get-ExchangeCertificate -Thumbprint c4248cd7065c87cb942d60f7293feb7d533a4afc | New-ExchangeCertificate

    Note: please change the Thumbprint to your self-signed cert.

    Regards,

    Perry


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    • Proposed as answer by Perry_Pan Friday, December 13, 2019 9:15 AM
    Wednesday, December 11, 2019 10:13 AM
  • all right then.

    I guest I was thinking it might require exporting, since the cert has identical serial and thumbmprint on both servers, but renewing on both is certainly simpler.

    Wednesday, December 11, 2019 1:59 PM
  • If you have other questions about this issue, feel free to post back.

    If the information is helpful to you, would you mind helping mark it as answer?  This will make answer searching in the forum easier and be beneficial to other community members as well. 

    Have a nice day!

    Regards,

    Perry


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Thursday, December 12, 2019 1:08 AM
  • Here I will provide a brief summary of this post for your information.

     

    [Request/Expectation]

    ====================

    How to renew self-signed Exchange certificate

     

    [Suggestions]

    ====================

    For self-signed certificate, you can renew it on both servers. Use following command:

    Get-ExchangeCertificate -Thumbprint c4248cd7065c87cb942d60f7293feb7d533a4afc | New-ExchangeCertificate

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    • Edited by Perry_Pan Monday, December 16, 2019 6:14 AM
    Monday, December 16, 2019 6:13 AM
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