Security Update For Exchange Server 2013 CU23 (KB5000871) won't be installed.

Mikhail 1 Reputation point
2021-03-12T15:53:32.143+00:00

. Security Update For Exchange Server 2013 CU23 (KB5000871) won't be installed.

Application event logs shows:

Product: Microsoft Exchange Server - Update 'Security Update for Exchange Server 2013 Cumulative Update 23 (KB5000871) 15.0.1497.12' could not be installed. Error code 1603. Windows Installer can create logs to help troubleshoot issues with installing software packages. Use the following link for instructions on turning on logging support:

CU23 was installed successfully

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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  1. Kael Yao-MSFT 37,676 Reputation points Microsoft Vendor
    2021-03-15T07:54:46.043+00:00

    Hi, @Mikhail

    Did you install the KB5000871 via cmd?
    If not, please open cmd and Run as administrator to install the security update as mentioned in this document:
    Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: March 2, 2021 (KB5000871)
    77684-84.png

    If the problem persists, please follow the link below to turn on the logging support and see if the detailed message will be logged in the log file.
    Enable Windows Installer logging


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