About the security alerts of Exchange 2016/2019

Lotfi BOUCHERIT 91 Reputation points

We have our Exchange servers 2016 in CU15.
I would like to know, if this version also in risk of those problems or not?
Thank you in advance

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Windows Server Security
Windows Server Security
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Security: The precautions taken to guard against crime, attack, sabotage, espionage, or another threat.
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  1. Robert Sparnaaij [MVP] 1,811 Reputation points MVP

    Yes, and even a couple more since CU15 has been out of support for a good while now (June 16, 2020) and other security updates have been released in the mean time as well.

    Update to CU19 as soon as possible and then apply the security updates.

    Once CU20 comes out, make a plan to update to remain supported; Only the last 2 CUs are supported, so once CU22 comes out, CU20 is no longer supported.

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  2. Andy David - MVP 144.8K Reputation points MVP

    Note you can now apply a CU15 specific patch. If you cant upgrade to CU19, then apply this patch in the short term to protect your servers and upgrade to CU19 as soon as possible


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  3. Eric Yin-MSFT 4,386 Reputation points

    Agree with Andy, you need to upgrade to CU19 and install the patch.
    You can follow the blog to install the upgrade: https://practical365.com/exchange-server/installing-cumulative-updates-on-exchange-server-2016/

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  4. Lotfi BOUCHERIT 91 Reputation points

    thank you all for your support,
    i did find practical365 blog regarding installing cu to exchange 2016,
    just would like to know, if it would be the same steps for installing the cu19 patch?
    thank you in advance,