Connection Interrupted, issue reported with different version of Citrix Virtual Apps and Desktops

  1. Microsoft has fixed the issue in the Microsoft Defender Antivirus (MDAV) Platform Update version 4.18.2201.10 (or newer).

What was optimized? Microsoft added the AllowSwitchToAsyncInspection setting toSet-MpPreference. This policy enables a performance optimization, that allows synchronously inspected network flows, to switch to async inspection once they’ve been checked and validated.

Workaround:

1. Revert to Windows Defender update version 4.18.2105.4

OR

2. Disable Network protection and Network intrusion prevention on VDA:

Configure policy setting

“Computer ConfigurationAdministrative TemplatesWindows ComponentsWindows Defender AntivirusWindows Defender Exploit GuardNetwork ProtectionPrevent users and apps from accessing dangerous websites” to “Audit Mode”

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