Use the WholeClear Exchange Server Migration Tool. Users can store all Exchange Server items in PST. This tool lets you save your original data and gives you the choice to filter it. You won't lose any info when you back up Exchange mailbox files to a PST file. Outlook PST lets users store the whole Exchange server, including the main folder, the backup folder, the public folder, and more. This tool shows the whole process of backing up a log report. Every version of the Windows OS can run this tool. Get a free trial version.