If you are Looking for the best solution to get back up of Exchange Server than I would suggest you try Exchange Server Backup and Restore tool. This tool will help you to export Exchange mailbox into PST. This tool has a simple and unique GUI (Graphic User Interface) which makes it easy to use for technical and non-technical users. It provides an option to schedule periodically backup for timely Backup as well. One can also download a free trial version to know its features.