diff --git a/src/AppInstallerCLICore/Commands/DscUserSettingsFileResource.cpp b/src/AppInstallerCLICore/Commands/DscUserSettingsFileResource.cpp
index 27a44e4ad7..1dfa846070 100644
--- a/src/AppInstallerCLICore/Commands/DscUserSettingsFileResource.cpp
+++ b/src/AppInstallerCLICore/Commands/DscUserSettingsFileResource.cpp
@@ -4,6 +4,7 @@
 #include "DscUserSettingsFileResource.h"
 #include "DscComposableObject.h"
 #include "Resources.h"
+#include "AppInstallerStrings.h"
 
 using namespace AppInstaller::Utility::literals;
 using namespace AppInstaller::Settings;
@@ -16,7 +17,7 @@ namespace AppInstaller::CLI
     namespace
     {
         WINGET_DSC_DEFINE_COMPOSABLE_PROPERTY_FLAGS(SettingsProperty, Json::Value, Settings, "settings", DscComposablePropertyFlag::Required | DscComposablePropertyFlag::CopyToOutput, Resource::String::DscResourcePropertyDescriptionUserSettingsFileSettings);
-        WINGET_DSC_DEFINE_COMPOSABLE_PROPERTY_ENUM(ActionProperty, std::string, Action, "action", Resource::String::DscResourcePropertyDescriptionUserSettingsFileAction, ({ ACTION_PARTIAL, ACTION_FULL }), ACTION_FULL);
+        WINGET_DSC_DEFINE_COMPOSABLE_PROPERTY_ENUM(ActionProperty, std::string, Action, "action", Resource::String::DscResourcePropertyDescriptionUserSettingsFileAction, ({ ACTION_PARTIAL, ACTION_FULL }), ACTION_PARTIAL);
 
         using UserSettingsFileResourceObject = DscComposableObject<StandardInDesiredStateProperty, SettingsProperty, ActionProperty>;
 
@@ -38,7 +39,6 @@ namespace AppInstaller::CLI
 
             void Get()
             {
-                Output.Action(ACTION_FULL);
                 Output.Settings(GetUserSettings());
             }
 
@@ -64,12 +64,14 @@ namespace AppInstaller::CLI
                 THROW_HR_IF(E_UNEXPECTED, !Input.Settings().has_value());
                 if (!_resolvedInputUserSettings)
                 {
-                    if(Input.Action() == ACTION_FULL)
+                    if(Input.Action().has_value() && Utility::CaseInsensitiveEquals(Input.Action().value(), ACTION_FULL))
                     {
+                        Output.Action(ACTION_FULL);
                         _resolvedInputUserSettings = Input.Settings();
                     }
                     else
                     {
+                        Output.Action(ACTION_PARTIAL);
                         _resolvedInputUserSettings = MergeUserSettingsFiles(*Input.Settings());
                     }
                 }
diff --git a/src/AppInstallerCLIE2ETests/DSCv3UserSettingsFileResourceCommand.cs b/src/AppInstallerCLIE2ETests/DSCv3UserSettingsFileResourceCommand.cs
index b798243759..c3f86c2692 100644
--- a/src/AppInstallerCLIE2ETests/DSCv3UserSettingsFileResourceCommand.cs
+++ b/src/AppInstallerCLIE2ETests/DSCv3UserSettingsFileResourceCommand.cs
@@ -61,7 +61,7 @@ public void Setup()
     }
 
     /// <summary>
-    /// Calls `get` on the `user-settings` resource.
+    /// Calls `get` on the `user-settings-file` resource.
     /// </summary>
     [Test]
     public void UserSettingsFile_Get()
@@ -70,12 +70,12 @@ public void UserSettingsFile_Get()
         var getOutput = Get(new ());
 
         Assert.IsNotNull(getOutput);
-        Assert.AreEqual(ActionPropertyValueFull, getOutput.Action);
+        Assert.IsNull(getOutput.Action);
         AssertSettingsAreEqual(expected, getOutput.Settings);
     }
 
     /// <summary>
-    /// Calls `set` on the `user-settings` resource with no diff.
+    /// Calls `set` on the `user-settings-file` resource with no diff.
     /// </summary>
     /// <param name="action">The action value.</param>
     [Test]
@@ -90,13 +90,13 @@ public void UserSettingsFile_Set_NoDiff(string action)
         var expected = GetCurrentUserSettings();
 
         Assert.IsNotNull(setOutput);
-        Assert.AreEqual(ActionPropertyValueFull, setOutput.Action);
+        Assert.AreEqual(action, setOutput.Action);
         AssertSettingsAreEqual(expected, setOutput.Settings);
         AssertDiffState(setDiff, []);
     }
 
     /// <summary>
-    /// Calls `set` on the `user-settings` resource to add fields.
+    /// Calls `set` on the `user-settings-file` resource to add fields.
     /// </summary>
     /// <param name="action">The action value.</param>
     [Test]
@@ -114,14 +114,37 @@ public void UserSettingsFile_Set_AddFields(string action)
 
         // Assert that the settings are added
         Assert.IsNotNull(setOutput);
-        Assert.AreEqual(ActionPropertyValueFull, setOutput.Action);
+        Assert.AreEqual(action, setOutput.Action);
         AssertMockProperties(setOutput.Settings, "mock");
         AssertSettingsAreEqual(expected, setOutput.Settings);
         AssertDiffState(setDiff, [ SettingsPropertyName ]);
     }
 
     /// <summary>
-    /// Calls `set` on the `user-settings` resource to update fields.
+    /// Calls `set` on the `user-settings-file` resource to ensure action is partial by default.
+    /// </summary>
+    [Test]
+    public void UserSettingsFile_Set_ActionIsPartialByDefault()
+    {
+        // Call `set` to add mock properties to the settings
+        var setSettings = GetSettingsArg(ActionPropertyValuePartial);
+        AddOrModifyMockProperties(setSettings, "mock");
+
+        var expected = GetCurrentUserSettings();
+        AddOrModifyMockProperties(expected, "mock");
+
+        (var setOutput, var setDiff) = Set(new () { Settings = setSettings });
+
+        // Assert that the settings are added
+        Assert.IsNotNull(setOutput);
+        Assert.AreEqual(setOutput.Action, ActionPropertyValuePartial);
+        AssertMockProperties(setOutput.Settings, "mock");
+        AssertSettingsAreEqual(expected, setOutput.Settings);
+        AssertDiffState(setDiff, [ SettingsPropertyName ]);
+    }
+
+    /// <summary>
+    /// Calls `set` on the `user-settings-file` resource to update fields.
     /// </summary>
     /// <param name="action">The action value.</param>
     [Test]
@@ -144,14 +167,14 @@ public void UserSettingsFile_Set_UpdateFields(string action)
 
         // Assert that the settings are updated
         Assert.IsNotNull(setOutput);
-        Assert.AreEqual(ActionPropertyValueFull, setOutput.Action);
+        Assert.AreEqual(action, setOutput.Action);
         AssertMockProperties(setOutput.Settings, "mock_new");
         AssertSettingsAreEqual(expected, setOutput.Settings);
         AssertDiffState(setDiff, [ SettingsPropertyName ]);
     }
 
     /// <summary>
-    /// Calls `test` on the `user-settings` resource to check if the settings are in desired state.
+    /// Calls `test` on the `user-settings-file` resource to check if the settings are in desired state.
     /// </summary>
     /// <param name="action">The action value.</param>
     [Test]
@@ -174,7 +197,7 @@ public void UserSettingsFile_Test_InDesiredState(string action)
 
         // Assert that the settings are in desired state
         Assert.IsNotNull(testOutput);
-        Assert.AreEqual(ActionPropertyValueFull, testOutput.Action);
+        Assert.AreEqual(action, testOutput.Action);
         AssertMockProperties(testOutput.Settings, "mock");
         AssertSettingsAreEqual(expected, testOutput.Settings);
         Assert.IsTrue(testOutput.InDesiredState);
@@ -182,7 +205,7 @@ public void UserSettingsFile_Test_InDesiredState(string action)
     }
 
     /// <summary>
-    /// Calls `test` on the `user-settings` resource to check if the settings are not in desired state.
+    /// Calls `test` on the `user-settings-file` resource to check if the settings are not in desired state.
     /// </summary>
     /// <param name="action">The action value.</param>
     [Test]
@@ -205,7 +228,7 @@ public void UserSettingsFile_Test_NotInDesiredState(string action)
 
         // Assert that the settings are not in desired state
         Assert.IsNotNull(testOutput);
-        Assert.AreEqual(ActionPropertyValueFull, testOutput.Action);
+        Assert.AreEqual(action, testOutput.Action);
         AssertMockProperties(testOutput.Settings, "mock_set");
         AssertSettingsAreEqual(expected, testOutput.Settings);
         Assert.IsFalse(testOutput.InDesiredState);
@@ -213,7 +236,7 @@ public void UserSettingsFile_Test_NotInDesiredState(string action)
     }
 
     /// <summary>
-    /// Calls `export` on the `user-settings` resource to export the settings.
+    /// Calls `export` on the `user-settings-file` resource to export the settings.
     /// </summary>
     [Test]
     public void UserSettingsFile_Export()
@@ -222,12 +245,12 @@ public void UserSettingsFile_Export()
         var exportOutput = Export(new ());
 
         Assert.IsNotNull(exportOutput);
-        Assert.AreEqual(ActionPropertyValueFull, exportOutput.Action);
+        Assert.IsNull(exportOutput.Action);
         AssertSettingsAreEqual(expected, exportOutput.Settings);
     }
 
     /// <summary>
-    /// Calls `get` on the `user-settings` resource.
+    /// Calls `get` on the `user-settings-file` resource.
     /// </summary>
     /// <param name="resourceData">The input resource data.</param>
     /// <returns>The output resource data.</returns>
@@ -239,7 +262,7 @@ private static UserSettingsFileResourceData Get(UserSettingsFileResourceData res
     }
 
     /// <summary>
-    /// Calls `set` on the `user-settings` resource.
+    /// Calls `set` on the `user-settings-file` resource.
     /// </summary>
     /// <param name="resourceData">The input resource data.</param>
     /// <returns>The output resource data and the diff.</returns>
@@ -251,7 +274,7 @@ private static (UserSettingsFileResourceData, List<string>) Set(UserSettingsFile
     }
 
     /// <summary>
-    /// Calls `test` on the `user-settings` resource.
+    /// Calls `test` on the `user-settings-file` resource.
     /// </summary>
     /// <param name="resourceData">The input resource data.</param>
     /// <returns>The output resource data and the diff.</returns>
@@ -263,7 +286,7 @@ private static (UserSettingsFileResourceData, List<string>) Test(UserSettingsFil
     }
 
     /// <summary>
-    /// Calls `export` on the `user-settings` resource.
+    /// Calls `export` on the `user-settings-file` resource.
     /// </summary>
     /// <param name="resourceData">The input resource data.</param>
     /// <returns>The output resource data.</returns>
@@ -333,6 +356,7 @@ private class UserSettingsFileResourceData
         [JsonPropertyName(InDesiredStatePropertyName)]
         public bool? InDesiredState { get; set; }
 
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
         public string Action { get; set; }
 
         public JsonObject Settings { get; set; }