diff --git a/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java b/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java
index be41c0ff5cc..38e70d1ee17 100644
--- a/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java
+++ b/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java
@@ -80,21 +80,20 @@ public class ExternalSourcesDetails extends AppInfoWithHeader
     }
 
     public static CharSequence getPreferenceSummary(Context context, AppEntry entry) {
+        final UserHandle userHandle = UserHandle.getUserHandleForUid(entry.info.uid);
         final UserManager um = UserManager.get(context);
         final int userRestrictionSource = um.getUserRestrictionSource(
-                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES,
-                UserHandle.getUserHandleForUid(entry.info.uid));
-        switch (userRestrictionSource) {
-            case UserManager.RESTRICTION_SOURCE_DEVICE_OWNER:
-            case UserManager.RESTRICTION_SOURCE_PROFILE_OWNER:
-                return context.getString(R.string.disabled_by_admin);
-            case UserManager.RESTRICTION_SOURCE_SYSTEM:
-                return context.getString(R.string.disabled);
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES, userHandle)
+                | um.getUserRestrictionSource(
+                        UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY,
+                        userHandle);
+        if ((userRestrictionSource & UserManager.RESTRICTION_SOURCE_SYSTEM) != 0) {
+            return context.getString(R.string.disabled_by_admin);
+        } else if (userRestrictionSource != 0) {
+            return context.getString(R.string.disabled);
         }
-
         final InstallAppsState appsState = new AppStateInstallAppsBridge(context, null, null)
                 .createInstallAppsStateFor(entry.info.packageName, entry.info.uid);
-
         return context.getString(appsState.canInstallApps()
                 ? R.string.app_permission_summary_allowed
                 : R.string.app_permission_summary_not_allowed);
@@ -119,6 +118,10 @@ public class ExternalSourcesDetails extends AppInfoWithHeader
             return true;
         }
         mSwitchPref.checkRestrictionAndSetDisabled(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES);
+        if (!mSwitchPref.isDisabledByAdmin()) {
+            mSwitchPref.checkRestrictionAndSetDisabled(
+                    UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY);
+        }
         if (mSwitchPref.isDisabledByAdmin()) {
             return true;
         }
diff --git a/tests/robotests/src/com/android/settings/applications/appinfo/ExternalSourcesDetailsTest.java b/tests/robotests/src/com/android/settings/applications/appinfo/ExternalSourcesDetailsTest.java
index d636fa468ef..e625eee5c9c 100644
--- a/tests/robotests/src/com/android/settings/applications/appinfo/ExternalSourcesDetailsTest.java
+++ b/tests/robotests/src/com/android/settings/applications/appinfo/ExternalSourcesDetailsTest.java
@@ -17,29 +17,36 @@
 package com.android.settings.applications.appinfo;
 
 import static com.google.common.truth.Truth.assertThat;
-
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.nullable;
+import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
+import android.content.Context;
+import android.content.ContextWrapper;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageInfo;
+import android.os.UserHandle;
 import android.os.UserManager;
-
 import com.android.settings.applications.AppStateInstallAppsBridge;
 import com.android.settings.applications.AppStateInstallAppsBridge.InstallAppsState;
+import com.android.settings.testutils.shadow.ShadowUserManager;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settingslib.RestrictedPreferenceHelper;
 import com.android.settingslib.RestrictedSwitchPreference;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadow.api.Shadow;
 import org.robolectric.util.ReflectionHelpers;
 
 @RunWith(SettingsRobolectricTestRunner.class)
+@Config(shadows = {ShadowUserManager.class})
 public class ExternalSourcesDetailsTest {
 
     @Mock
@@ -47,6 +54,8 @@ public class ExternalSourcesDetailsTest {
     @Mock
     private RestrictedSwitchPreference mSwitchPref;
     @Mock
+    private RestrictedPreferenceHelper mHelper;
+    @Mock
     private PackageInfo mPackageInfo;
 
     private ExternalSourcesDetails mFragment;
@@ -90,5 +99,128 @@ public class ExternalSourcesDetailsTest {
         mFragment.refreshUi();
 
         assertThat(mFragment.refreshUi()).isTrue();
+        assertThat(mSwitchPref.isDisabledByAdmin()).isFalse();
+    }
+
+    @Test
+    public void refreshUi_userRestrictionsUnknownSources_disablesSwitchPreference() {
+        // Mocks set up
+        final ExternalSourcesDetails fragment = new ExternalSourcesDetails();
+        final ContextWrapper context = RuntimeEnvironment.application;
+        final UserManager userManager = (UserManager) context.getSystemService(
+                Context.USER_SERVICE);
+        final ShadowUserManager shadowUserManager = Shadow.extract(userManager);
+
+        ReflectionHelpers.setField(fragment, "mSwitchPref", mSwitchPref);
+        ReflectionHelpers.setField(fragment, "mPackageInfo", mPackageInfo);
+        mPackageInfo.applicationInfo = new ApplicationInfo();
+        ReflectionHelpers.setField(fragment, "mUserManager", userManager);
+        ReflectionHelpers.setField(mSwitchPref, "mHelper", mHelper);
+
+        final AppStateInstallAppsBridge appBridge = mock(AppStateInstallAppsBridge.class);
+        ReflectionHelpers.setField(fragment, "mAppBridge", appBridge);
+        when(appBridge.createInstallAppsStateFor(nullable(String.class), anyInt()))
+                .thenReturn(mock(InstallAppsState.class));
+
+        // Test restriction set up
+        shadowUserManager.setUserRestriction(UserHandle.of(UserHandle.myUserId()),
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES, true);
+        doAnswer((answer) -> {
+            when(mSwitchPref.isDisabledByAdmin()).thenReturn(true);
+            return null;
+        }).when(mSwitchPref).checkRestrictionAndSetDisabled(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES);
+
+        // Code execution
+        assertThat(fragment.refreshUi()).isTrue();
+
+        // Assertions
+        assertThat(shadowUserManager.hasUserRestriction(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES,
+                UserHandle.of(UserHandle.myUserId()))).isTrue();
+        assertThat(mSwitchPref.isDisabledByAdmin()).isTrue();
+    }
+
+    @Test
+    public void refreshUi_userRestrictionsUnknownSourcesGlobally_disablesSwitchPreference() {
+        // Mocks set up
+        final ExternalSourcesDetails fragment = new ExternalSourcesDetails();
+        final ContextWrapper context = RuntimeEnvironment.application;
+        final UserManager userManager = (UserManager) context.getSystemService(
+                Context.USER_SERVICE);
+        final ShadowUserManager shadowUserManager = Shadow.extract(userManager);
+
+        ReflectionHelpers.setField(fragment, "mSwitchPref", mSwitchPref);
+        ReflectionHelpers.setField(fragment, "mPackageInfo", mPackageInfo);
+        mPackageInfo.applicationInfo = new ApplicationInfo();
+        ReflectionHelpers.setField(fragment, "mUserManager", userManager);
+        ReflectionHelpers.setField(mSwitchPref, "mHelper", mHelper);
+
+        final AppStateInstallAppsBridge appBridge = mock(AppStateInstallAppsBridge.class);
+        ReflectionHelpers.setField(fragment, "mAppBridge", appBridge);
+        when(appBridge.createInstallAppsStateFor(nullable(String.class), anyInt()))
+                .thenReturn(mock(InstallAppsState.class));
+
+        // Test restriction set up
+        shadowUserManager.setUserRestriction(UserHandle.of(UserHandle.myUserId()),
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY, true);
+        doAnswer((answer) -> {
+            when(mSwitchPref.isDisabledByAdmin()).thenReturn(true);
+            return null;
+        }).when(mSwitchPref).checkRestrictionAndSetDisabled(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY);
+
+        // Code execution
+        assertThat(fragment.refreshUi()).isTrue();
+
+        // Assertions
+        assertThat(shadowUserManager.hasUserRestriction(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY,
+                UserHandle.of(UserHandle.myUserId()))).isTrue();
+        assertThat(mSwitchPref.isDisabledByAdmin()).isTrue();
+    }
+
+    @Test
+    public void refreshUi_bothUnknownSourcesUserRestrictions_disableSwitchPreference() {
+        // Mocks set up
+        final ExternalSourcesDetails fragment = new ExternalSourcesDetails();
+        final ContextWrapper context = RuntimeEnvironment.application;
+        final UserManager userManager = (UserManager) context.getSystemService(
+                Context.USER_SERVICE);
+        final ShadowUserManager shadowUserManager = Shadow.extract(userManager);
+
+        ReflectionHelpers.setField(fragment, "mSwitchPref", mSwitchPref);
+        ReflectionHelpers.setField(fragment, "mPackageInfo", mPackageInfo);
+        mPackageInfo.applicationInfo = new ApplicationInfo();
+        ReflectionHelpers.setField(fragment, "mUserManager", userManager);
+        ReflectionHelpers.setField(mSwitchPref, "mHelper", mHelper);
+
+        final AppStateInstallAppsBridge appBridge = mock(AppStateInstallAppsBridge.class);
+        ReflectionHelpers.setField(fragment, "mAppBridge", appBridge);
+        when(appBridge.createInstallAppsStateFor(nullable(String.class), anyInt()))
+                .thenReturn(mock(InstallAppsState.class));
+
+        // Test restriction set up
+        shadowUserManager.setUserRestriction(UserHandle.of(UserHandle.myUserId()),
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY, true);
+        shadowUserManager.setUserRestriction(UserHandle.of(UserHandle.myUserId()),
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES, true);
+        doAnswer((answer) -> {
+            when(mSwitchPref.isDisabledByAdmin()).thenReturn(true);
+            return null;
+        }).when(mSwitchPref).checkRestrictionAndSetDisabled(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY);
+
+        // Code execution
+        assertThat(fragment.refreshUi()).isTrue();
+
+        // Assertions
+        assertThat(shadowUserManager.hasUserRestriction(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY,
+                UserHandle.of(UserHandle.myUserId()))).isTrue();
+        assertThat(shadowUserManager.hasUserRestriction(
+                UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES,
+                UserHandle.of(UserHandle.myUserId()))).isTrue();
+        assertThat(mSwitchPref.isDisabledByAdmin()).isTrue();
     }
 }