If the User Account Control dialog box appears, verify that the default action is the action that you want, and then select Continue. In the results, right-click Command Prompt, and then select Run as administrator.
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To avoid this issue, follow these steps to manually install this security update: Note: This issue does not occur if you install the update through Microsoft Update. The issue occurs because the security update doesn’t correctly stop certain Exchange-related services. This issue occurs on servers that are using User Account Control (UAC). However, Outlook Web Access (OWA) and the Exchange Control Panel (ECP) might stop working. When this issue occurs, you don’t receive an error message or any indication that the security update was not correctly installed. 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. You can use this information to verify the security update status of Exchange-based servers in your network. The Exchange Server version number is now added to the HTTP response reply header. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures (CVE):ĬVE-2021-41349 | Microsoft Exchange Server Spoofing VulnerabilityĬVE-2021-42305 | Microsoft Exchange Server Spoofing VulnerabilityĬVE-2021-42321 | Microsoft Exchange Server Remote Code Execution Vulnerability This security update rollup resolves vulnerabilities in Microsoft Exchange Server. Exchange Server 2019 Exchange Server 2016 Exchange Server 2013 More.