Hotfix update for Microsoft Exchange Server 2019 CU15 was released on April 18, 2025. It includes fixes for non-security issues and introduces new features. These fixes and features will also be included in later cumulative updates for Exchange Server 2019.

Using Windows Update, Windows can automatically check if there are drivers available for new devices that are connected to a Windows device. For devices previously connected to a Windows device, updated drivers might also become available. These drivers can also be installed via Windows Update.

Update drivers through Device Manager in Windows. Tip: The best way to get driver updates in Windows is automatically using Windows Update. For more information, see Automatically get recommended drivers and updates for your hardware.

Cumulative Update 15 for Microsoft Exchange Server 2019 was released on February 10, 2025. It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2019.

Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

Need to know which version of Windows 11 is running on your device? You can check quickly and easily. In the search box on the taskbar, type winver, then select winver from the list of results. Need to know about required disk space, error codes, removing an installed update, or other update questions? Find more help at Windows Update: FAQ. Note:

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

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Update process is stuck due to an incomplete update or connection issue. Warning: Microsoft only recommends trying the procedures in this section if you're comfortable working in the command line.

To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed. You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.