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Exchange Team Blog
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No Exchange Server Security Updates for November 2025

The_Exchange_Team's avatar
The_Exchange_Team
Platinum Contributor
Nov 11, 2025

Although Exchange 2016 and 2019 are now out of support, some customers have purchased the Exchange 2016 and 2019 Extended Security Update (ESU). We have therefore decided that until the end of this Exchange 2016 and 2019 ESU period (April 2026) we will make an explicit update related announcement even if we DO NOT release anything for that particular month.

There are no security releases for any version of Exchange Server in November 2025, for customers with Exchange SE, or Exchange 2016 or 2019 ESU.

Please keep upgrading your organizations to Exchange SE.

The Exchange Team

Published Nov 11, 2025
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5 Comments

  • Pascal_de_Vries's avatar
    Pascal_de_Vries
    Copper Contributor
    Nov 21, 2025

    Just a quick question related to public certificates and Exchange on-prem. As you know, the certificate life-time for public certificates will be shortened from 1 year to 47 days, so we have to automate the certificate renewals. While there are solutions like "simple-acme" and "CertifyTheWeb" and they work very well on single instances of Exchange servers, I have yet to find a solution if you have 2 or more DAGs behind a load balancer. There you have to ensure the load balancer and all the Exchange DAGs have the same certificates.

    I guess you could write a script to copy PFX files around and import certificates, but this is a bit messy if everyone has to write there own scripts and do password handling for the PFX files etc. 

    Is there a plan to have something official from Microsoft built-in into Exchange to make this simpler?

    Sorry to abuse this thread, but didn't find any other area where I could ask this. 

  • Bri's avatar
    Bri
    Copper Contributor
    Nov 17, 2025

    This is useful at least whilst the ESU is in effect for clarity

  • Dennisdsmolinski's avatar
    Dennisdsmolinski
    Brass Contributor
    Nov 14, 2025

    I think this is a good thing to do every month going into the future.  Eliminates the element of surprise or wonder.

    • Nino_Bilic's avatar
      Nino_Bilic
      Icon for Microsoft rankMicrosoft
      Nov 14, 2025

      Hmm; could do. Curious if others feel the same way.