New Outlook

config/tweaks.json
2370  "WPFToggleNewOutlook": {
2371    "Content": "New Outlook",
2372    "Description": "If disabled it removes the toggle for new Outlook, disables the new Outlook migration and makes sure the Outlook Application actually uses the old Outlook.",
2373    "category": "Customize Preferences",
2374    "panel": "2",
2375    "Type": "Toggle",
2376    "registry": [
2377      {
2378        "Path": "HKCU:\\SOFTWARE\\Microsoft\\Office\\16.0\\Outlook\\Preferences",
2379        "Name": "UseNewOutlook",
2380        "Value": "1",
2381        "OriginalValue": "0",
2382        "DefaultState": "true",
2383        "Type": "DWord"
2384      },
2385      {
2386        "Path": "HKCU:\\Software\\Microsoft\\Office\\16.0\\Outlook\\Options\\General",
2387        "Name": "HideNewOutlookToggle",
2388        "Value": "0",
2389        "OriginalValue": "1",
2390        "DefaultState": "true",
2391        "Type": "DWord"
2392      },
2393      {
2394        "Path": "HKCU:\\Software\\Policies\\Microsoft\\Office\\16.0\\Outlook\\Options\\General",
2395        "Name": "DoNewOutlookAutoMigration",
2396        "Value": "0",
2397        "OriginalValue": "0",
2398        "DefaultState": "false",
2399        "Type": "DWord"
2400      },
2401      {
2402        "Path": "HKCU:\\Software\\Policies\\Microsoft\\Office\\16.0\\Outlook\\Preferences",
2403        "Name": "NewOutlookMigrationUserSetting",
2404        "Value": "0",
2405        "OriginalValue": "<RemoveEntry>",
2406        "DefaultState": "true",
2407        "Type": "DWord"
2408      }
2409    ],

Registry Changes

Applications and System Components store and retrieve configuration data to modify windows settings, so we can use the registry to change many settings in one place.

You can find information about the registry on Wikipedia and Microsoft’s Website.