You can run Outlook CalDav Synchronizer on Windows operating systems. Outlook CalDav Synchronizer is a software product developed by Gerhard Zehetbauer and it is listed in the category. Outlook CalDav Synchronizer is a free software product listed under The GNU General Public License (GNU GPL or GPL) license which means that it is fully functional for an unlimited time and that you have freedom to run, study, share (copy), and modify the software.