Checked: Prevents user from overriding the set of attachments blocked by Outlook. Outlook also checks "Level1Remove" key when this setting is specified. | Unchecked: Allows user to override the set of attachments blocked by Outlook. However, Outlook checks "Level1Remove" key next to determine if attachment list overrides are allowed.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Microsoft\Office\12.0\Outlook |
| Value Name | DisallowAttachmentCustomization |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |