Verify the build number post-installation using the Exchange Management Shell (EMS): powershell
Perform a full VSS-based backup of your Exchange databases and Active Directory.
Blocks man-in-the-middle (MitM) authentication relay attacks automatically.
You can download Exchange Server 2019 CU14 from the following locations: exchange server 2019 cu14 download
This security feature hardens Windows Authentication to mitigate "Man-in-the-Middle" (MitM) attacks. While CU14 enables it by default, administrators should run the ExchangeExtendedProtectionCheck.ps1 script before installation to ensure environment compatibility.
To ensure a secure installation, always use official Microsoft sources: Exchange Server 2019 CU14 (KB5035432)
Resolves multiple zero-day flaws reported via the MSRC. System Requirements & Prerequisites Operating System Windows Server 2019: Standard or Datacenter editions. Verify the build number post-installation using the Exchange
CU14 includes various security updates, bug fixes, and performance improvements. Some of the key changes include:
Open PowerShell as an Administrator and execute these commands sequentially: powershell
The most significant change in CU14 is the introduction of . While CU14 enables it by default, administrators should
However, if you specifically need (released March 2024):
As of my knowledge cutoff, CU14 is not the latest update . The current latest version is CU15 (released September 2024) or CU16 (expected/released after that). Microsoft typically supports only the latest two CUs. You should generally install the latest CU (e.g., CU15) , not CU14, unless you have a specific requirement to stop at CU14.
This update paves the way for TLS 1.3 support when running on Windows Server 2022. Pre-Installation Checklist
Place the server in maintenance mode if you are operating in a Database Availability Group (DAG).