Microsoft Defender AV must be configured to perform a weekly scheduled scan.
This policy setting allows specifying the day of the week on which to perform a scheduled scan. The scan can also be configured to run every day or to never run at all. This setting can be configured with the following ordinal number values:
(0x0) Every Day
(0x8) Never (default)
If this setting is enabled, a scheduled scan will run at the frequency specified. If this setting is disabled or not configured, a scheduled scan will run at a default frequency.
Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Scan >> "Specify the day of the week to run a scheduled scan" is set to "Enabled" and anything other than "Never" is selected in the drop-down box.
Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows Defender\Scan
Criteria: If the value "ScheduleDay" is REG_DWORD = 0x8, this is a finding.
Values of 0x0 through 0x7 are acceptable and not a finding.
Fix Text (F-14673r823069_fix)
Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Scan >> "Specify the day of the week to run a scheduled scan" to "Enabled " and select anything other than "Never" in the drop-down box.