learn.microsoft.com › en-us › outlookOutlook Trust Center shows antivirus status as unavailable ... Jul 21, 2022 · Outlook depends upon the Windows Security Center (WSC) on the operating system to detect the status of the antivirus software on the machine. Since the antivirus status isn't listed within the WSC on Windows Server Operating Systems, it is unable to obtain this information that results in the message we are seeing within Outlook.