The following issues reported for April 2021 SUs also apply to July SUs and have the following workarounds: Known issues in July 2021 security updatesĭuring the release of April 2021 SUs, we received some reports of issues after installation.
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How to update AD schema to address CVE-2021-34470 if Exchange is very old or no longer installed Older versions of Exchange (earlier than 2013)Įxchange no longer installed in the forest In case of Schema Master existing in an empty root domain, consider installing Exchange CU23 Management Tools on Windows 2012 R2 in the same domain, installing July SU and then running \prepareschema from that workstation. For Exchange 2013 only, schema version will not change after this. “Setup.exe /PrepareSchema /IAcceptExchangeServerLicenseTerms” using the setup.exe from location “c:\Program Files\Microsoft\Exchange Server\V15\Bin\setup.exe” (use the folder for the installation location of your Exchange server) Command will be similar to the following: Extend the Active Directory schema using the elevated Command prompt.
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Install July 2021 Security Update for Exchange 2013
Nothing schema was extended during installation of June 2021 CUs. Latest /PrepareSchema needed for full effectīecause of additional security hardening work for CVE-2021-34470, the following actions should be taken in addition to application of July 2021 security updates:Īdditional steps needed to extend AD schema 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. Although we are not aware of any active exploits in the wild, our recommendation is to install these updates immediately to protect your environment. The July 2021 security updates for Exchange Server address vulnerabilities responsibly 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 must install. Updates are available for the following specific builds of Exchange Server: Microsoft has released security updates for vulnerabilities found in:Īll versions (Cumulative Update levels) are impacted.
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