vtiger CRM is an open source Customer Relationship Management (CRM) software mainly for Sales force working in small and medium businesses. vtiger CRM is built over proven, fast, and reliable LAMP/WAMP (Linux/Windows, Apache, MySQL, and PHP) technologies and open source projects, such as SugarCRM (SPL 1.1.2), phpBB (GPL), and others. vtiger CRM leverages the benefits of open source software and adds more value to the end-users by providing many enterprise features, such as Microsoft® Outlook® integration, Message Board integration, Email integration, Security Management, Product Customization, and others. vtiger CRM also provides, enterprise grade business productivity enhancement utility, vtiger Outlook Plug-in for Microsoft® Outlook® users. It is an Open Source Project covered under vtiger Public License 1.0 (VPL 1.0) based on Mozilla Public License 1.1, and complements the vtiger CRM software. Microsoft® Outlook® integration with vtiger CRM reduces the unnecessary duplication of work while communicating with customers.