diff --git a/src/app/code/community/Zendesk/Zendesk/Model/Api/Users.php b/src/app/code/community/Zendesk/Zendesk/Model/Api/Users.php
index c09166a2..9e0ebd36 100644
--- a/src/app/code/community/Zendesk/Zendesk/Model/Api/Users.php
+++ b/src/app/code/community/Zendesk/Zendesk/Model/Api/Users.php
@@ -59,7 +59,7 @@ public function all()
         while($page && $response = $this->_call('users.json?page=' . $page)) {
             $users      = array_merge($users, $response['users']);
             $page       = is_null($response['next_page']) ? 0 : $page + 1;
-    }
+        }
     
         return $users;
     }
@@ -115,4 +115,21 @@ public function createUserField($field)
  
         return $response['user_field'];
     }
+
+    /**
+     * Fetch all user fields
+     * 
+     * @return array $userFields
+     */
+    public function getUserFields()
+    {
+        $page = 1;
+        $userFields = array();
+        while($page && $response = $this->_call('user_fields.json?page=' . $page)) {
+            $userFields = array_merge($userFields, $response['user_fields']);
+            $page       = is_null($response['next_page']) ? 0 : $page + 1;
+        }
+    
+        return $userFields;
+    }
 }
diff --git a/src/app/code/community/Zendesk/Zendesk/controllers/Adminhtml/ZendeskController.php b/src/app/code/community/Zendesk/Zendesk/controllers/Adminhtml/ZendeskController.php
index b07988ed..2e849877 100644
--- a/src/app/code/community/Zendesk/Zendesk/controllers/Adminhtml/ZendeskController.php
+++ b/src/app/code/community/Zendesk/Zendesk/controllers/Adminhtml/ZendeskController.php
@@ -526,7 +526,9 @@ public function syncAction()
         $this->getResponse()->clearHeaders()->setHeader('Content-type','application/json',true);
         Mage::log('Synchronization started', null, 'zendesk.log');
         try {
-            $user = Mage::getModel('zendesk/api_users')->all();
+            $userFieldKeys = array_column(Mage::getModel('zendesk/api_users')->getUserFields(), 'key');
+            $user = Mage::getModel('zendesk/api_users')->me();
+
             if (is_null($user))
                 throw new Exception("Connection Failed");
 
@@ -593,7 +595,11 @@ public function syncAction()
             );
 
             foreach($data as $field) {
+                if (in_array($field['user_field']['key'], $userFieldKeys))
+                    continue;
+
                 $response = Mage::getModel('zendesk/api_users')->createUserField($field);
+
                 if (!isset($response['active']) || $response['active'] === false)
                     Mage::log('Unable to create User Field with key '.$field['user_field']['key'], null, 'zendesk.log');
             }
diff --git a/src/app/code/community/Zendesk/Zendesk/functions.php b/src/app/code/community/Zendesk/Zendesk/functions.php
new file mode 100644
index 00000000..4da1c071
--- /dev/null
+++ b/src/app/code/community/Zendesk/Zendesk/functions.php
@@ -0,0 +1,116 @@
+<?php
+
+if (!function_exists('array_column')) {
+	/**
+	 * This file is part of the array_column library
+	 *
+	 * For the full copyright and license information, please view the LICENSE
+	 * file that was distributed with this source code.
+	 *
+	 * @copyright Copyright (c) Ben Ramsey (http://benramsey.com)
+	 * @license http://opensource.org/licenses/MIT MIT
+	 */
+
+	/**
+	 * Returns the values from a single column of the input array, identified by
+	 * the $columnKey.
+	 *
+	 * Optionally, you may provide an $indexKey to index the values in the returned
+	 * array by the values from the $indexKey column in the input array.
+	 *
+	 * @param array $input A multi-dimensional array (record set) from which to pull
+	 *                     a column of values.
+	 * @param mixed $columnKey The column of values to return. This value may be the
+	 *                         integer key of the column you wish to retrieve, or it
+	 *                         may be the string key name for an associative array.
+	 * @param mixed $indexKey (Optional.) The column to use as the index/keys for
+	 *                        the returned array. This value may be the integer key
+	 *                        of the column, or it may be the string key name.
+	 * @return array
+	 */
+	function array_column($input = null, $columnKey = null, $indexKey = null)
+	{
+		// Using func_get_args() in order to check for proper number of
+		// parameters and trigger errors exactly as the built-in array_column()
+		// does in PHP 5.5.
+		$argc = func_num_args();
+		$params = func_get_args();
+
+		if ($argc < 2) {
+			trigger_error("array_column() expects at least 2 parameters, {$argc} given", E_USER_WARNING);
+			return null;
+		}
+
+		if (!is_array($params[0])) {
+			trigger_error(
+				'array_column() expects parameter 1 to be array, ' . gettype($params[0]) . ' given',
+				E_USER_WARNING
+			);
+			return null;
+		}
+
+		if (!is_int($params[1])
+			&& !is_float($params[1])
+			&& !is_string($params[1])
+			&& $params[1] !== null
+			&& !(is_object($params[1]) && method_exists($params[1], '__toString'))
+		) {
+			trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING);
+			return false;
+		}
+
+		if (isset($params[2])
+			&& !is_int($params[2])
+			&& !is_float($params[2])
+			&& !is_string($params[2])
+			&& !(is_object($params[2]) && method_exists($params[2], '__toString'))
+		) {
+			trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING);
+			return false;
+		}
+
+		$paramsInput = $params[0];
+		$paramsColumnKey = ($params[1] !== null) ? (string) $params[1] : null;
+
+		$paramsIndexKey = null;
+		if (isset($params[2])) {
+			if (is_float($params[2]) || is_int($params[2])) {
+				$paramsIndexKey = (int) $params[2];
+			} else {
+				$paramsIndexKey = (string) $params[2];
+			}
+		}
+
+		$resultArray = array();
+
+		foreach ($paramsInput as $row) {
+			$key = $value = null;
+			$keySet = $valueSet = false;
+
+			if ($paramsIndexKey !== null && array_key_exists($paramsIndexKey, $row)) {
+				$keySet = true;
+				$key = (string) $row[$paramsIndexKey];
+			}
+
+			if ($paramsColumnKey === null) {
+				$valueSet = true;
+				$value = $row;
+			} elseif (is_array($row) && array_key_exists($paramsColumnKey, $row)) {
+				$valueSet = true;
+				$value = $row[$paramsColumnKey];
+			}
+
+			if ($valueSet) {
+				if ($keySet) {
+					$resultArray[$key] = $value;
+				} else {
+					$resultArray[] = $value;
+				}
+			}
+
+		}
+
+		return $resultArray;
+	}
+
+}