Lookeen - Email Search for Professionals! Lookeen is an add-in extension for Microsoft Outlook. It's a search tool that is seamlessly integrated in your Outlook and will search everywhere in your Outlook data. Have every email at your fingertips - no matter how much data you have! The integrated real-time-indexing enables you to search your local emails (PST), Exchange Server, Public Folder, your complete desktop and even network files, all while