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Microsoft Releases New Exchange Server Security Updates to Fix Localization Issues

Microsoft has released a new version of the August 2023 security updates for Exchange Server. The company pulled the updates from its Windows Update servers and enterprise update channels following reports about issues with the non-English installations of Exchange Server.

Microsoft released the Patch Tuesday updates for on-premises Exchange Server 2016 and 2019 on August 8, 2023. The security updates were intended to address six vulnerabilities, including an elevation of privileges flaw and two remote code execution flaws. Microsoft also fixed a spoofing vulnerability that could let malicious actors launch an NTLM Relay attack.

In an updated blog post, Microsoft acknowledged that the Exchange services failed to start after installing the August 2023 security updates on non-English servers. The problem was caused by a localization issue in the Exchange Server security update installer. Microsoft provided a temporary workaround to enable the Windows servers and start Exchange Server.

Microsoft released yesterday an updated August 2023 security update for Exchange Server 2016 and 2019. The company explained that IT admins would need to take actions based on their specific environment. “The updated SUs resolve the localization issue, but if you were affected by the issue and used the workaround to install the original release, you need to act,” Microsoft explained.

Latest Exchange Server updates reportedly cause certificate issues

In a comment on the Techcommunity post, an IT admin reported that they were unable to renew the certificate after installing version 2 of Exchange Server updates. However, there are some suggestions about how to resolve this problem. Some reports also suggest that the original security update (v1) is still being offered on Windows Server Update Services (WSUS).

Did you encounter any issues after installing the latest Patch Tuesday updates for Exchange Server? Let us know in the comments section below.