diff --git a/res/values/strings.xml b/res/values/strings.xml
index 95fa9367b..b83aea74b 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1215,4 +1215,8 @@ as <xliff:g id="filename">%s</xliff:g>.</string>
     <!-- A long placeholder string to be used in template XML files message_list_item_*.xml.
          Used only in layout computation, and never actually exposed to the user. -->
     <string name="long_string" translatable="false">looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong</string>
+
+    <!-- This is the message warning the user that they must sync manually when roaming. [CHAR LIMIT=none]-->
+    <string name="require_manual_sync_message">Background sync for this account is disabled while\
+     roaming.</string>
 </resources>
diff --git a/src/com/android/email/Preferences.java b/src/com/android/email/Preferences.java
index 8e448bb90..f960797ae 100644
--- a/src/com/android/email/Preferences.java
+++ b/src/com/android/email/Preferences.java
@@ -50,6 +50,7 @@ public class Preferences {
     private static final String BACKGROUND_ATTACHMENTS = "backgroundAttachments";
     private static final String TRUSTED_SENDERS = "trustedSenders";
     private static final String LAST_ACCOUNT_USED = "lastAccountUsed";
+    private static final String REQUIRE_MANUAL_SYNC_DIALOG_SHOWN = "requireManualSyncDialogShown";
 
     public static final int AUTO_ADVANCE_NEWER = 0;
     public static final int AUTO_ADVANCE_OLDER = 1;
@@ -287,6 +288,34 @@ public class Preferences {
                 .apply();
     }
 
+    /**
+     * Gets whether the require manual sync dialog has been shown for the specified account.
+     * It should only be shown once per account.
+     */
+    public boolean getHasShownRequireManualSync(Context context, Account account) {
+        return getBoolean(context, account.getEmailAddress(), REQUIRE_MANUAL_SYNC_DIALOG_SHOWN,
+                false);
+    }
+
+    /**
+     * Sets whether the require manual sync dialog has been shown for the specified account.
+     * It should only be shown once per account.
+     */
+    public void setHasShownRequireManualSync(Context context, Account account, boolean value) {
+        setBoolean(context, account.getEmailAddress(), REQUIRE_MANUAL_SYNC_DIALOG_SHOWN, value);
+    }
+
+
+    /**
+     * Get whether to show the manual sync dialog. This dialog is shown when the user is roaming,
+     * connected to a mobile network, the administrator has set the RequireManualSyncWhenRoaming
+     * flag to true, and the dialog has not been shown before for the supplied account.
+     */
+    public boolean shouldShowRequireManualSync(Context context, Account account) {
+        return Account.isAutomaticSyncDisabledByRoaming(context, account.mId)
+                && !getHasShownRequireManualSync(context, account);
+    }
+
     public void clear() {
         mSharedPreferences.edit().clear().apply();
     }
@@ -298,4 +327,25 @@ public class Preferences {
             }
         }
     }
+
+    /**
+     * Utility method for setting a boolean value on a per-account preference.
+     */
+    private void setBoolean(Context context, String account, String key, Boolean value) {
+        mSharedPreferences.edit().putBoolean(makeKey(account, key), value).apply();
+    }
+
+    /**
+     * Utility method for getting a boolean value from a per-account preference.
+     */
+    private boolean getBoolean(Context context, String account, String key, boolean def) {
+        return mSharedPreferences.getBoolean(makeKey(account, key), def);
+    }
+
+    /**
+     * Utility method for creating a per account preference key.
+     */
+    private String makeKey(String account, String key) {
+        return account != null ? account + "-" + key : key;
+    }
 }
diff --git a/src/com/android/email/RequireManualSyncDialog.java b/src/com/android/email/RequireManualSyncDialog.java
new file mode 100644
index 000000000..d1c60b9a2
--- /dev/null
+++ b/src/com/android/email/RequireManualSyncDialog.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.email;
+
+import com.android.emailcommon.provider.Account;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.res.Resources;
+
+public class RequireManualSyncDialog extends AlertDialog implements OnClickListener {
+
+    public RequireManualSyncDialog(Context context, Account account) {
+        super(context);
+        setMessage(context.getResources().getString(R.string.require_manual_sync_message));
+        setButton(DialogInterface.BUTTON_POSITIVE, context.getString(android.R.string.ok), this);
+        Preferences.getPreferences(context).setHasShownRequireManualSync(context, account, true);
+    }
+
+    /** {@inheritDoc} */
+    public void onClick(DialogInterface dialog, int which) {
+        // No-op.
+    }
+}
\ No newline at end of file
diff --git a/src/com/android/email/activity/UIControllerBase.java b/src/com/android/email/activity/UIControllerBase.java
index e353a27c2..15809acd2 100644
--- a/src/com/android/email/activity/UIControllerBase.java
+++ b/src/com/android/email/activity/UIControllerBase.java
@@ -32,6 +32,7 @@ import com.android.email.MessageListContext;
 import com.android.email.Preferences;
 import com.android.email.R;
 import com.android.email.RefreshManager;
+import com.android.email.RequireManualSyncDialog;
 import com.android.email.activity.setup.AccountSettings;
 import com.android.email.activity.setup.MailboxSettings;
 import com.android.emailcommon.Logging;
@@ -206,7 +207,9 @@ abstract class UIControllerBase implements MailboxListFragment.Callback,
         if (mNfcHandler != null) {
             mNfcHandler.onAccountChanged();  // workaround for email not set on initial load
         }
-        Preferences.getPreferences(mActivity).setLastUsedAccountId(getUIAccountId());
+        long accountId = getUIAccountId();
+        Preferences.getPreferences(mActivity).setLastUsedAccountId(accountId);
+        showAccountSpecificWarning(accountId);
     }
 
     /**
@@ -558,6 +561,7 @@ abstract class UIControllerBase implements MailboxListFragment.Callback,
             mNfcHandler.onAccountChanged();
         }
         Preferences.getPreferences(mActivity).setLastUsedAccountId(accountId);
+        showAccountSpecificWarning(accountId);
     }
 
     /**
@@ -1017,6 +1021,18 @@ abstract class UIControllerBase implements MailboxListFragment.Callback,
         }
     }
 
+
+    private void showAccountSpecificWarning(long accountId) {
+        if (accountId != Account.NO_ACCOUNT && accountId != Account.NO_ACCOUNT) {
+            Account account = Account.restoreAccountWithId(mActivity, accountId);
+            if (account != null &&
+                    Preferences.getPreferences(mActivity)
+                    .shouldShowRequireManualSync(mActivity, account)) {
+                new RequireManualSyncDialog(mActivity, account).show();
+            }
+        }
+    }
+
     @Override
     public String toString() {
         return getClass().getSimpleName(); // Shown on logcat