But the other two new on-premises servers did not. SharePoint Server and Project Server Subscription Editions launched as planned. The catch: All would require a subscription to get support, product updates, and security updates. There, too, such problems occur during the AMSI scan.Two years ago, Microsoft officials announced the next versions of on-premises Exchange Server, SharePoint Server, Skype for Business Server, and Project Server would be available in the second half of 2021. The second external virus scanner mentioned is Sophos Intercept X for Server. If the AMSI scan by the McAfee Endpoit Security Client is disabled by the administrator, the observed problems are gone again. In addition, it is reported that Outlook repeatedly does not respond (especially when the cache mode is turned off).įrank explicitly mentions the McAfee Endpoit Security Client causing these error patterns. It has also been observed that Outlook startup can take several minutes. As a result, it is no longer possible to work with Outlook. Frank wrote, that there are cases, where Outlook will be in connection with the Exchange Server sometimes becomes extremely slow. Frank Zöchling has touched this issues within FrankysWeb in his German article Exchange 2016/2019: AMSI Integration sorgt für Probleme mit Outlook in early July 2021.Īccording to Zöchling, various antivirus scanners, which are used in conjunction with Microsoft Outlook, causes serious issues. Now, however, it looks like this very AMSI integration can cause problems with various third-party antivirus scanners. The details can be read in the blog post Cumulative Exchange CUs June 2021 released and on the linked Microsoft pages. The scan is performed in real-time by any AMSI-enabled antivirus/antimalware solution running on Exchange Server as soon as the server starts processing the request. The AMSI integration in Exchange Server provides an AMSI-enabled antivirus/antimalware solution the ability to scan content in HTTP requests sent to Exchange Server and block a malicious request before it is processed by Exchange Server. Microsoft had indicated when it unveiled the quarterly cumulative updates for Exchange Server that they introduce new Exchange Server integration with AMSI ( Antimalware Scan Interface). The download addresses are provided in the blog post linked above. Exchange Server 2016 Cumulative Update 21 ( KB5003611).Exchange Server 2019 Cumulative Update 10 ( KB5003612).I had pointed out in the blog post Cumulative Exchange CUs June 2021 released that Microsoft has released the cumulative quarterly updates for Exchange Server on June 29, 2021:
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