November 2025 Patch Tuesday: Is Windows Exchange Server Reaching EOL?

Hi friends! Can you believe it’s almost time for November's Patch Tuesday? If you’re like me and always looking for ways to secure your systems, you are probably wondering: does this mean that Windows Exchange Server is starting EOL this month? Not so fast—but what is to come?

What About Windows Updates?​

Last month, there were a massive amount of updates from Microsoft. Windows 10 saw a total of 116 fixes and Windows 11 had 134! That’s quite a few updates! Some versions are officially EOL, like Windows 11 22H2 Enterprise and Education.

This month, we anticipate Windows 11 23H2 Pro will also be EOL. Enterprises and Education will still be supported following this month until November 2026. Windows 10 Enterprise LTSC 2021 and IoT Enterprise LTSC 2021 are still acceptable to run as well.

What about Exchange Server?​

As for Exchange Server—many of the earlier versions are already EOL. A lot of companies are not going to Microsoft 365 yet—mostly expensive and too slow. If you’re still running an Exchange Server, there are still guides from agencies in the security community, including CISA and NSA on how to protect your systems.

Key Security Issues to Monitor​

Heads-up! A significant WSUS security issue (CVE-2025-59287) is actively being exploited by attackers. It impacts Windows Server 2012 to 2025 and comes in at a 9.8 on the CVSS scale, which is severe. If you have not applied this security patch yet, do so immediately! These types of updates are the first I will patch as a best practice; you don't want to wait too long.

What’s Coming Up This November​

Here's what we can expect:

• There is a much lower volume of updates this month - therefore, it will be slightly easier to manage.
• Updates to Windows, Office, and SharePoint expect.
• Adobe applications (potentially InDesign and/or Photoshop) could have updates. Acrobat and Reader have already been patched.
• Speaking of updates, Apple and Google have also recently issued security updates - but don't forget about Safari and Chrome!
• Firefox 144 saw its updates on the weekend of October 28, for which we may see follow-up updates for November or December.

It feels as if the flooding of updates has slowed a little bit, but managing devices with older software versions is always a challenge. My recommendation is to keep your computers patched with updates to meet critical security issues, and be sure to plan ahead if you are proposing to migrate Exchange servers.

Concluding Observations​

Is Windows Exchange Server finally gone? Not yet, but we’re getting closer. November Patch Tuesday might be easier, but don’t forget about updates. Keep your computers safe, remedy critical issues quickly, and grab an extra cup of coffee: it’s going to be a busy week!