Update 10/10/2023: Our recommendation to address CVE-2023-21709 is now changed; please see the changes below.
Update 9/12/2023: As a part of the September 2023 "Patch Tuesday" we have released a fe...
Updated Oct 10, 2023
Version 18.0
Blog Post
This Exchange SU cannot be installed in our environments (OS and Exchange in de-de). Installer throws Error 1603.
Tested on Exchange Server 2016 CU23 SU8 on Windows Server 2016 as well as Exchange Server 2019 CU13 SU1 on Windows Server 2022.
Property(C): msgINTERIMUPDATEDETECTED = Unable to install because a previous Interim Update for Microsoft Exchange Server 2016 Cumulative Update 23 has been installed. Please use Add/Remove Programs to uninstall the Interim Update before running this setup again.
Property(C): msgRequiresProc = The version of this file is not compatible with the version of Microsoft Exchange Server 2016 Cumulative Update 23 that you're running. Check your computer to see whether you need an x64 (64-bit) or x86 (32-bit) version of this file.
MSI (c) (54:10) [22:15:58:033]: Product: Microsoft Exchange Server - Update 'Security Update for Exchange Server 2016 Cumulative Update 23 (KB5029388) 15.1.2507.31' could not be installed. Error code 1603. Additional information is available in the log file C:\Program Files\Microsoft\Exchange Server\V15\Logging\Update\msi\ExchangeUpdate_2023-08-08-195915.log.
MSI (c) (54:10) [22:15:58:034]: Windows Installer installed an update. Product Name: Microsoft Exchange Server. Product Version: 15.1.2507.6. Product Language: 1033. Manufacturer: Microsoft Corporation. Update Name: Security Update for Exchange Server 2016 Cumulative Update 23 (KB5029388) 15.1.2507.31. Installation success or error status: 1603.
Do I really have to uninstall the previous SU first?
The Patch even leaves the server in a non-working state with all Exchange services deactivated which have to be reset to automactic startup!