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In February Microsoft release another Exchange Security Update for supported versions Exchange 2013/ 2016 /2019.
This is the link to the original BlogPost Exchange Team
See the downloadlinks for the security patches:
- Exchange Server 2013 CU23 (note that support and availability of SUs end on April 11, 2023)
- Exchange Server 2016 CU23
- Exchange Server 2019 CU11 and CU12
Installing this patch does not differ from previous installations have a look this picture
Prerequisites are the latest CU.
NOTE: the new feature “PowerShell payload certificate signing” is NOT enabled by default, after installing this patch. You have to manually enable it. See the blogpost January 2023 or Microsoft link
Short reminder installing patches manually
FAQs is worth reading