Customers who installed the March 2021 security updates for supported CUs can install the April 2021 security updates and be protected against the vulnerabilities that were disclosed during both months. Yes, our security updates are cumulative. You do not need to re-run the Hybrid Configuration Wizard (HCW) after applying updates.ĭo the April 2021 security updates contain the March 2021 security updates for Exchange Server? While Exchange Online customers are already protected, the April 2021 security updates do need to be applied to your on-premises Exchange Server, even if it is used only for management purposes. My organization is in Hybrid mode with Exchange Online. If you encounter errors during or after installation, see Repair failed installations of Exchange Cumulative and Security updates. Make sure to follow the ExchangeUpdateWizard instructions and best practices for installation of updates carefully, including when to install using elevated command prompt. If you encounter errors during or after installation of Exchange Server updates Then click the “Tell me the steps” button, to get directions for your environment. Go to and choose your currently running CU and your target CU. Running this script will tell you if any of your Exchange Servers are behind on updates (CUs and SUs). Use the Exchange Server Health Checker script, which can be downloaded from GitHub (use the latest release), to inventory your servers. More details about specific CVEs can be found in Security Update Guide (filter on Exchange Server under Product Family). Exchange Online customers are already protected and do not need to take any action.įor additional information, please see the Microsoft Security Response Center (MSRC) blog. These vulnerabilities affect Microsoft Exchange Server. Although we are not aware of any active exploits in the wild, our recommendation is to install these updates immediately to protect your environment. Vulnerabilities addressed in the April 2021 security updates were responsibly reported to Microsoft by a security partner. msp from elevated command prompt (see Known Issues in update KB article). IMPORTANT: If manually installing security updates, you must install. These updates are available for the following specific builds of Exchange Server: Microsoft has released security updates for vulnerabilities found in:
0 Comments
Leave a Reply. |