ActiveX One-Off forms must be configured.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-228435 | SRG-APP-000210 | DTOO234 | SV-228435r508021_rule | 2022-03-11 | 2 |
Description
By default, third-party ActiveX controls are not allowed to run in one-off forms in Outlook. You can change this behavior so that Safe Controls (Microsoft Forms 2.0 controls and the Outlook Recipient and Body controls) are allowed in one-off forms, or so that all ActiveX controls are allowed to run.
ℹ️ Check
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Allow Active X One Off Forms" is set to "Enabled: Load only Outlook Controls".
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 AllowActiveXOneOffForms is REG_DWORD = 0, this is not a finding.
✔️ Fix
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Allow Active X One Off Forms" to "Enabled: Load only Outlook Controls".