Details
This setting controls whether Outlook users are allowed to send e-mail messages after they
see an encryption warning. If you enable this policy setting, encryption warning dialog
boxes do not contain a Continue button, which means that users must cancel the sending
operation entirely. If you disable or do not configure this policy setting, if Outlook users see
an encryption-related dialog box when attempting to send a message, they can choose to
dismiss the warning and send the message anyway. The recommended state for this setting
is- Enabled.
*Rationale*
By default, if Outlook 2010 users see an encryption-related dialog box when attempting to
send a message, they can choose to dismiss the warning and send the message anyway. If
users send messages after seeing an encryption error, it is likely that recipients will not be
able to read them.
Solution
To implement the recommended configuration state, set the following Group Policy setting
to Enabled.
User ConfigurationAdministrative TemplatesMicrosoft Outlook
2010SecurityCryptographyDo not provide Continue option on Encryption warning dialog
boxes
Impact-Enabling this setting can cause disruptions if Outlook 2010 users attempt to send messages
with encryption errors, although the errors themselves would likely cause disruptions in
most cases if the messages were allowed to be sent.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Communications Protection.This control applies to the following type of system Windows.