Description of the security update for Microsoft Exchange Server 2019 and 2016: June 11, 2019

Dotyczy: Exchange Server 2019Exchange Server 2016

This update rollup is a security update. This security update 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 from 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, 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: June 11, 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 2019 Exchange2019-KB4503027-x64-en.msp 5AF0E541F7787854CE72B1F3783A76D45E5EDD0F 3F797EF9EDF58D882EDD32C527A13061C5A42EFA77AB69863CB0BFAB170F8A30
Exchange Server 2019 Cumulative Update 1 Exchange2019-KB4503027-x64-en.msp 03FEA621A62DFFBDA4CF4609A173044B9447B3E0 8DA169BC0E873C9E6D03D1F12543FAECF667688244B0506146EF6216FF0AA9DF
Exchange Server 2016 Cumulative Update 11 Exchange2016-KB4503027-x64-en.msp 7686424D902BD38A6B8EBCF3A2FC340C5D1E0C81 6F9185F529A2F6BBBDA52305EEF41E1ADDFFA0C9978002FBB72AE0944785E41D
Exchange Server 2016 Cumulative Update 12 Exchange2016-KB4503027-x64-en.msp CE678881F36A3A0ED098F7B0DD2FA78382687FAF 15CD8D10ECDFE300ADADD6E0D45E9F99B5F8C651DA6ECCFD40F33FCC42ED8B71

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.