Active X One-Off forms must only be enabled to load with Outlook Controls.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-223352 | SRG-APP-000210 | O365-OU-000007 | SV-223352r961092_rule | 2025-03-05 | 3 |
| 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". Use the Windows Registry to navigate to the following key: HKCU\software\policies\microsoft\office\16.0\outlook\security If the value for 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". |