HKEY_CURRENT_USER\keycuexcelexternalcontent

Always prevent untrusted Microsoft Query files from opening
- HKEY_CURRENT_USER\keycuexcelexternalcontent\enableblockunsecurequeryfiles
Don't allow Dynamic Data Exchange (DDE) server launch in Excel
- HKEY_CURRENT_USER\keycuexcelexternalcontent\disableddeserverlaunch
Don't allow Dynamic Data Exchange (DDE) server lookup in Excel
- HKEY_CURRENT_USER\keycuexcelexternalcontent\disableddeserverlookup