Outlook must be configured not to prompt users to choose security settings if default settings fail.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-228473	SRG-APP-000516	DTOO315	SV-228473r508021_rule	2022-03-11	2

Description
Check to prompt the user to choose security settings if default settings fail; uncheck to automatically select.

ℹ️ Check
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prompt user to choose security settings if default settings fail" is set to "Disabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\16.0\outlook\security Criteria: If the value ForceDefaultProfile is REG_DWORD = 0, this is not a finding.

ℹ️ Check

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prompt user to choose security settings if default settings fail" is set to "Disabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\16.0\outlook\security Criteria: If the value ForceDefaultProfile is REG_DWORD = 0, this is not a finding.

✔️ Fix
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prompt user to choose security settings if default settings fail" to "Disabled".