Legacy Update: Get back online, activate, and install updates on your legacy Windows PC

Security Update for Exchange Server 2019 CU15 SU3 (KB5063221)

Please see the KB article for more information about security content in this update.

Files

Status: Live This download is still available on microsoft.com. The downloads below will come directly from the Microsoft Download Center.

Files
Exchange2019-KB5063221-x64-en.exe Size: 377.49 MB

For information about Exchange 2019 system requirements and prerequisites, see the following topics:

• Exchange 2019 System Requirements
• Exchange 2019 Prerequisites

Actual requirements will vary based on system configuration. For more detailed system requirements, please refer to the Exchange Server 2019 Technical Documentation Library.

We recommend that you restart your computer before you install a security update. Then, follow these steps:

1. Temporarily disable any anti-virus software.
2. To start the download, select the Download button, and then do one of the following:

• To start the installation immediately, select Run.
• To copy the download file to your computer for installation at a later time, select Save.
  

To change the display language for this webpage, open the Select Language list, and then select the language that you want.

3. After the installation is completed, re-enable the antivirus software, and then restart your computer. (The installation program may prompt you to restart. We strongly recommend that you restart the computer even if you are not prompted to do this.)

If problems occur during or after the installation, please see Repair failed installations of Exchange Cumulative and Security updates before you contact Microsoft Support.