Free DISA STIG and SRG Library | Vaulted
Removed

V-223353

Outlook must be configured to prevent users overriding attachment security settings.

Finding ID
O365-OU-000008
Rule ID
SV-223353r508019_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-APP-000340
CCI
CCI-002235
Target Key
(None)
Documentable
No
Discussion

This policy setting prevents users from overriding the set of attachments blocked by Outlook. If you enable this policy setting users will be prevented from overriding the set of attachments blocked by Outlook. Outlook also checks the "Level1Remove" registry key when this setting is specified. If you disable or do not configure this policy setting, users will be allowed to override the set of attachments blocked by Outlook.

Fix Text

Set the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Prevent users from customizing attachment security settings to "Enabled".

Check Content

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Prevent users from customizing attachment security settings is set to "Enabled". Use the Windows Registry to navigate to the following key: HKCU\software\policies\microsoft\office\16.0\outlook If the value for disallowattachmentcustomization is set to REG_DWORD = 1, this is not a finding.