Description of the security update for Microsoft Exchange Server 2013 and 2016: July 9, 2019

Applies to: Exchange Server 2016Exchange Server 2013

This update rollup is a security update that resolves vulnerabilities in Microsoft Exchange. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures (CVE):

Known issues in this security update


  • When you try to manually install this security update by double-clicking the update file (.msp) to run it in "Normal mode" (that is, not as an administrator), some files are not correctly updated.

    When this issue occurs, you don’t receive an error message or any indication that the security update was not correctly installed. However, Outlook Web Access (OWA) and the Exchange Control Panel (ECP) may stop working. This issue occurs on servers that are using user account control (UAC). The issue occurs because the security update doesn’t correctly stop certain Exchange-related services.

    To avoid this issue, follow these steps to manually install this security update:

    1. Select Start, and type cmd.
    2. In the results, right-click Command Prompt, and then select Run as administrator.
    3. If the User Account Control dialog box appears, verify that the default action is the action that you want, and then select Continue.
    4. Type the full path of the .msp file, and then press Enter.

    This issue does not occur when you install the update through Microsoft Update.

  • Exchange services may remain in a disabled state after you install this security update. This condition does not indicate that the update is not installed correctly. This condition may occur if the service control scripts experience a problem when they try to return Exchange services to its usual state. To fix this issue, use Services Manager to restore the startup type to Automatic, and then start the affected Exchange services manually. To avoid this issue, run the security update at an elevated command prompt. For more information about how to open an elevated Command Prompt window, see Start a Command Prompt as an Administrator.

How to get and install the update


Method 1: Microsoft Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center.

More information


Security update deployment information

For deployment information about this update, see security update deployment information: July 9, 2019

Security update replacement information

This security update replaces the following previously released update:

File information


File hash information

Update name File name SHA1 hash SHA256 hash
Exchange Server 2016 Cumulative Update 13 Exchange2016-KB4509409-x64-en.msp BDBD08C9658EB94FC70CA5D291BB58EEB9E51D9D 27BED6535C7C9CCDB8C4A9998FDC17D08B4754F9A303859D950611B491900C4B
Exchange Server 2016 Cumulative Update 12 Exchange2016-KB4509409-x64-en.msp 2BD14DD8CD4F3C97B6FA56E9B6B31C244E5B4F29 3195D2D24CA23C70DEDFA64EEC2C6DB9579320D42BA37883DC565DEFFB6A67CB
Exchange Server 2013 Cumulative Update 23 Exchange2013-KB4509409-x64-en.msp 68141FC90D7C3B9E4242EBBD03707276F73EEC47 AF92FDC9B179CB4FC4487F29AE2E875DF522B09D243705E904625F6ABD423BC2


Exchange server file information

The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight-saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

How to get help and support for this security update


Help for installing updates: Protect yourself online

Help for protecting your Windows-based computer from viruses and malware: Microsoft Security

Local support according to your country: International Support