Sync Issues Contains all of the synchronization logs. This folder is helpful if Outlook is having trouble synchronizing — for example, there is an item that you see in Outlook Web Access, but not in Outlook — or you are not getting new mail in some folders when using Cached Exchange Mode.
The information in this folder may help your organization's support team or Exchange server administrator determine what is wrong. The contents of the Sync Issues folder are not copied to your server, and you cannot view the items in the Sync Issues folder from any other computer.