diff --git a/SWADroid/AndroidManifest.xml b/SWADroid/AndroidManifest.xml
index d71db84b..143eab6a 100644
--- a/SWADroid/AndroidManifest.xml
+++ b/SWADroid/AndroidManifest.xml
@@ -7,6 +7,9 @@
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
+    <uses-permission android:name="android.permission.USE_CREDENTIALS" />
+    <uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
     <uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
     <uses-permission android:name="android.permission.READ_SYNC_SETTINGS" />
     <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" />
@@ -126,6 +129,12 @@
             android:configChanges="keyboard|keyboardHidden|orientation"
             android:label="@string/noticesModuleLabel"
             android:theme="@android:style/Theme.Translucent.NoTitleBar" >
+        </activity>        
+        
+        <activity
+            android:name=".sync.AccountAuthenticator"
+            android:configChanges="keyboard|keyboardHidden|orientation"
+            android:theme="@android:style/Theme.Translucent.NoTitleBar" >
         </activity>
         <activity
             android:name=".modules.downloads.DirectoryTreeDownload"
@@ -140,8 +149,8 @@
 
         <provider
             android:name=".sync.DummyProvider"
-            android:authorities="es.ugr.swad.content"
-            android:label="DummyProvider"
+            android:authorities="es.ugr.swad.swadroid.content"
+            android:label="SWADroid"
             android:syncable="true" />
 
         <service
diff --git a/SWADroid/res/values-es/strings.xml b/SWADroid/res/values-es/strings.xml
index dac7f43b..0c7d63d7 100644
--- a/SWADroid/res/values-es/strings.xml
+++ b/SWADroid/res/values-es/strings.xml
@@ -162,5 +162,5 @@
     <string name="scan_not_valid_code">Código QR no válido</string>
     <string name="scan_data_not_found">No existen datos de este alumno</string>
     <string name="scan_no_codes">No se ha detectado ningún código QR válido</string>
-    <string name="usersPresent">Estudiantes presentes</string>n
+    <string name="usersPresent">Estudiantes presentes</string>
 </resources>
diff --git a/SWADroid/res/xml/account_preferences.xml b/SWADroid/res/xml/account_preferences.xml
index 75f48c50..b2df6621 100644
--- a/SWADroid/res/xml/account_preferences.xml
+++ b/SWADroid/res/xml/account_preferences.xml
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen
   xmlns:android="http://schemas.android.com/apk/res/android">
-    <PreferenceCategory
-            android:title="General Settings" />
+<!--    <PreferenceCategory
+            android:title="@string/generalSettings" />
  
     <PreferenceScreen
         android:key="account_settings"
-        android:title="Account Settings"
-        android:summary="Sync frequency, notifications, etc.">
+        android:title="@string/accountSettings"
+        android:summary="@string/accountSettingsSummary">
         <intent
             android:action="es.ugr.swad.swadroid.Preferences.ACCOUNT_SETUP"
             android:targetPackage="es.ugr.swad.swadroid"
             android:targetClass="es.ugr.swad.swadroid.Preferences" />
-    </PreferenceScreen>
+    </PreferenceScreen> -->
 </PreferenceScreen>
\ No newline at end of file
diff --git a/SWADroid/res/xml/authenticator.xml b/SWADroid/res/xml/authenticator.xml
index bd4d7880..ed422892 100644
--- a/SWADroid/res/xml/authenticator.xml
+++ b/SWADroid/res/xml/authenticator.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <account-authenticator xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accountType="es.ugr.swad.swadroid"
     android:icon="@drawable/ic_launcher_swadroid"
     android:smallIcon="@drawable/ic_launcher_swadroid"
     android:label="@string/app_name"
diff --git a/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java b/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java
index b79654c0..cd84a935 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java
@@ -61,6 +61,7 @@ import es.ugr.swad.swadroid.modules.downloads.DirectoryTreeDownload
 import es.ugr.swad.swadroid.modules.notifications.Notifications;
 import es.ugr.swad.swadroid.modules.tests.Tests;
 import es.ugr.swad.swadroid.ssl.SecureConnection;
+import es.ugr.swad.swadroid.sync.AccountAuthenticator;
 
 /**
  * Main class of the application.
@@ -288,7 +289,7 @@ public class SWADMain extends MenuExpandableListActivity {
 
 			//Initialize HTTPS connections 
 			SecureConnection.initSecureConnection(); 
-
+			
 			//Check if this is the first run after an install or upgrade
 			lastVersion = prefs.getLastVersion();
 			currentVersion = getPackageManager().getPackageInfo(getPackageName(), 0).versionCode;
@@ -298,6 +299,11 @@ public class SWADMain extends MenuExpandableListActivity {
 				showConfigurationDialog();
 				dbHelper.initializeDB();
 				//prefs.upgradeCredentials();
+				
+				//Configure automatic synchronization
+				Intent activity = new Intent(getBaseContext(), AccountAuthenticator.class);
+				startActivity(activity);
+				
 				prefs.setLastVersion(currentVersion);
 				firstRun = true;
 				Global.setSelectedCourseCode(-1);
@@ -307,6 +313,11 @@ public class SWADMain extends MenuExpandableListActivity {
 				//showUpgradeDialog();
 				dbHelper.upgradeDB(this);
 				//prefs.upgradeCredentials();
+
+				//Configure automatic synchronization
+				Intent activity = new Intent(getBaseContext(), AccountAuthenticator.class);
+				startActivity(activity);
+				
 				prefs.setLastVersion(currentVersion);
 			}
 			listCourses = dbHelper.getAllRows(Global.DB_TABLE_COURSES,"","name");
diff --git a/SWADroid/src/es/ugr/swad/swadroid/modules/Module.java b/SWADroid/src/es/ugr/swad/swadroid/modules/Module.java
index 56b54604..6d36ebc1 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/modules/Module.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/modules/Module.java
@@ -488,7 +488,8 @@ public abstract class Module extends MenuActivity {
         boolean showDialog, isLoginModule;
 
 		/**
-		 * Shows progress dialog and connects to SWAD in background
+		 * Shows progress dialog and connects to SWAD in bac
+	  Log.i(TAG, "performSync: " + account.toString());kground
 		 * @param showDialog Flag for show a progress dialog or not
 		 * @param progressDescription Description to be showed in dialog
 		 * @param progressTitle Title to be showed in dialog
diff --git a/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java b/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java
index 06040464..fea70b12 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java
@@ -20,20 +20,15 @@ package es.ugr.swad.swadroid.modules.notifications;
 
 import java.io.IOException;
 import java.security.NoSuchAlgorithmException;
-import java.util.Vector;
-
 import org.ksoap2.SoapFault;
-import org.ksoap2.serialization.SoapObject;
 import org.xmlpull.v1.XmlPullParserException;
 
-import android.app.Notification;
-import android.app.NotificationManager;
-import android.app.PendingIntent;
+import android.accounts.Account;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.os.Bundle;
-import android.util.Log;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
@@ -48,7 +43,6 @@ import com.android.dataframework.DataFramework;
 import es.ugr.swad.swadroid.Global;
 import es.ugr.swad.swadroid.R;
 import es.ugr.swad.swadroid.model.DataBaseHelper;
-import es.ugr.swad.swadroid.model.SWADNotification;
 import es.ugr.swad.swadroid.modules.Module;
 
 /**
@@ -60,7 +54,7 @@ public class Notifications extends Module {
 	/**
 	 * Max size to store notifications 
 	 */
-	private static final int SIZE_LIMIT = 25;
+	//private static final int SIZE_LIMIT = 25;
 	/**
 	 * Notifications adapter for showing the data
 	 */
@@ -80,15 +74,23 @@ public class Notifications extends Module {
 	/**
 	 * Notifications counter
 	 */
-	private int notifCount;
+	//private int notifCount;
 	/**
 	 * Unique identifier for notification alerts
 	 */
-	private int NOTIF_ALERT_ID = 1982;
+	//private int NOTIF_ALERT_ID = 1982;
 	/**
 	 * Notifications tag name for Logcat
 	 */
 	public static final String TAG = Global.APP_TAG + " Notifications";
+	/**
+	 * Account type
+	 */
+	private static String accountType = "es.ugr.swad.swadroid";
+	/**
+	 * Synchronization authority
+	 */
+	private static String authority = "es.ugr.swad.swadroid.content";
 
 	/**
 	 * Refreshes data on screen
@@ -125,14 +127,13 @@ public class Notifications extends Module {
 				TextView sender = (TextView) v.findViewById(R.id.eventSender);
 				TextView course = (TextView) v.findViewById(R.id.eventLocation);
 				TextView summary = (TextView) v.findViewById(R.id.eventSummary);
-				TextView content = (TextView) v.findViewById(R.id.eventText);			
+				TextView content = (TextView) v.findViewById(R.id.eventText);	
+				
 				Intent activity = new Intent(getApplicationContext(), NotificationItem.class);
-
 				activity.putExtra("sender", sender.getText().toString());
 				activity.putExtra("course", course.getText().toString());
 				activity.putExtra("summary", summary.getText().toString());
 				activity.putExtra("content", content.getText().toString());
-
 				startActivity(activity);
 			}    	
 		};
@@ -198,6 +199,8 @@ public class Notifications extends Module {
 	@Override
 	protected void onResume() {		
 		super.onResume();		
+		 
+
 		refreshScreen();
 	}
 
@@ -208,9 +211,13 @@ public class Notifications extends Module {
 	protected void requestService() throws NoSuchAlgorithmException,
 	IOException, XmlPullParserException, SoapFault,
 	IllegalAccessException, InstantiationException {
-
+		
+		//Call synchronization service
+		Account account = new Account(getString(R.string.app_name), accountType);
+		ContentResolver.requestSync(account, authority, null);
+		
 		//Calculates next timestamp to be requested
-		Long timestamp = new Long(dbHelper.getFieldOfLastNotification("eventTime"));
+		/*Long timestamp = new Long(dbHelper.getFieldOfLastNotification("eventTime"));
 		timestamp++;
 
 		//Creates webservice request, adds required params and sends request to webservice
@@ -243,7 +250,7 @@ public class Notifications extends Module {
 
 				/*if(isDebuggable)
 	    			Log.d(TAG, n.toString());*/
-			}
+			/*}
 
 			//Request finalized without errors
 			Log.i(TAG, "Retrieved " + notifCount + " notifications");
@@ -252,10 +259,10 @@ public class Notifications extends Module {
 			dbHelper.clearOldNotifications(SIZE_LIMIT);
 
 			dbHelper.endTransaction();
-		}
+		}*/
 	}
 
-	protected void alertNotif() {
+	/*protected void alertNotif() {
 		if(notifCount > 0) {
 			//Obtain a reference to the notification service
 			String ns = Context.NOTIFICATION_SERVICE;
@@ -293,7 +300,7 @@ public class Notifications extends Module {
 			//Send alert
 			notManager.notify(NOTIF_ALERT_ID, notif);
 		}
-	}
+	}*/
 
 	/* (non-Javadoc)
 	 * @see es.ugr.swad.swadroid.modules.Module#connect()
@@ -314,7 +321,7 @@ public class Notifications extends Module {
 		refreshScreen();
 		//Toast.makeText(this, R.string.notificationsDownloadedMsg, Toast.LENGTH_SHORT).show();
 
-		alertNotif();
+		//alertNotif();
 
 		ProgressBar pb = (ProgressBar)this.findViewById(R.id.progress_refresh);
 		ImageButton updateButton = (ImageButton)this.findViewById(R.id.refresh);
diff --git a/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/NotificationsSyncAdapterService.java b/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/NotificationsSyncAdapterService.java
index 4953d436..5f35ff00 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/NotificationsSyncAdapterService.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/NotificationsSyncAdapterService.java
@@ -19,12 +19,35 @@
 
 package es.ugr.swad.swadroid.modules.notifications;
 
+import java.io.IOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Vector;
+
+import org.ksoap2.SoapEnvelope;
+import org.ksoap2.SoapFault;
+import org.ksoap2.serialization.SoapObject;
+import org.ksoap2.serialization.SoapSerializationEnvelope;
+import org.ksoap2.transport.KeepAliveHttpsTransportSE;
+import org.xmlpull.v1.XmlPullParserException;
+
+import com.android.dataframework.DataFramework;
+
+import es.ugr.swad.swadroid.Base64;
+import es.ugr.swad.swadroid.Global;
+import es.ugr.swad.swadroid.Preferences;
+import es.ugr.swad.swadroid.R;
+import es.ugr.swad.swadroid.model.DataBaseHelper;
+import es.ugr.swad.swadroid.model.SWADNotification;
+
 import android.accounts.Account;
 import android.accounts.OperationCanceledException;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.app.Service;
 import android.content.AbstractThreadedSyncAdapter;
 import android.content.ContentProviderClient;
-import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SyncResult;
diff --git a/SWADroid/src/es/ugr/swad/swadroid/sync/AccountAuthenticator.java b/SWADroid/src/es/ugr/swad/swadroid/sync/AccountAuthenticator.java
index 37758365..0050fde8 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/sync/AccountAuthenticator.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/sync/AccountAuthenticator.java
@@ -1,30 +1,46 @@
 package es.ugr.swad.swadroid.sync;
 
 import es.ugr.swad.swadroid.Preferences;
+import es.ugr.swad.swadroid.R;
 import android.accounts.Account;
 import android.accounts.AccountAuthenticatorActivity;
 import android.accounts.AccountAuthenticatorResponse;
 import android.accounts.AccountManager;
+import android.content.ContentResolver;
 import android.os.Bundle;
 
 public class AccountAuthenticator extends AccountAuthenticatorActivity {
+	/**
+	 * Account type
+	 */
+	private static String accountType = "es.ugr.swad.swadroid";
+	/**
+	 * Synchronization authority
+	 */
+	private static String authority = "es.ugr.swad.swadroid.content";
+	
 	@Override
 	protected void onCreate(Bundle icicle) {		
 		super.onCreate(icicle);
 	    Preferences prefs = new Preferences();
 	    prefs.getPreferences(getBaseContext()); 
-		Account account = new Account(prefs.getUserID(), "es.ugr.swad.swadroid");
+		Account account = new Account(getString(R.string.app_name), accountType);
 		AccountManager am = AccountManager.get(this);
-		boolean accountCreated = am.addAccountExplicitly(account, prefs.getUserPassword(), null);
+		boolean accountCreated = am.addAccountExplicitly(account, getString(R.string.app_name), null);
 		 
 		Bundle extras = getIntent().getExtras();
 		if (extras != null) {
 		 if (accountCreated) {  //Pass the new account back to the account manager
 		  AccountAuthenticatorResponse response = extras.getParcelable(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE);
 		  Bundle result = new Bundle();
-		  result.putString(AccountManager.KEY_ACCOUNT_NAME, prefs.getUserID());
-		  result.putString(AccountManager.KEY_ACCOUNT_TYPE, "es.ugr.swad.swadroid");
+		  result.putString(AccountManager.KEY_ACCOUNT_NAME, account.name);
+		  result.putString(AccountManager.KEY_ACCOUNT_TYPE, account.type);
 		  response.onResult(result);
+		  
+		  //Configure automatic synchronization
+    	  ContentResolver.setIsSyncable(account, authority, 1);
+    	  ContentResolver.setMasterSyncAutomatically(true);
+    	  ContentResolver.setSyncAutomatically(account, authority, true);
 		 }
 		 finish();
 		}