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Microsoft outlook 2016 upgrade7/11/2023 Go to and choose your currently running CU and your target CU to get directions for your environment. 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 (use the latest release) to inventory your servers. Inventory your Exchange Servers / determine which updates are needed 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. ![]() ![]() These vulnerabilities affect on-premises Microsoft Exchange Server, including servers used by customers in Exchange Hybrid mode. Our recommendation is to install these updates immediately to protect your environment. ![]() We are aware of limited targeted attacks in the wild using one of vulnerabilities ( CVE-2021-42321), which is a post-authentication vulnerability in Exchange 20. The November 2021 security updates for Exchange Server address vulnerabilities reported by security partners and found through Microsoft’s internal processes. msp from elevated command prompt (see Known Issues in update KB article). IMPORTANT: If manually installing security updates, you mustinstall. These updates are available for the following specific builds of Exchange Server: ![]() Microsoft has released security updates for vulnerabilities found in:
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