I got an error in Outlook which said to look in the Sync Issues folder for more details.
Where is that folder located?
It sounds like you are using an Exchange account or the Outlook Hotmail Connector add-in. In both cases, the Sync Issues folder is located in Outlook itself.
Folder List navigation
You are probably now in the Mail Navigation. To see the folder, you’ll need to switch to the Folder List Navigation. To get there, use the Navigation icons in the Navigation Pane, the Go menu or by pressing CTRL+6 on your keyboard.
Subfolders of Sync Issues
The main synchronization log is kept in the Sync Issues folder. The actual items involved are kept in subfolders called;
- Local Failures
- Server Failures
When an item is in such a folder, it means its changes either could not be uploaded or download or the same item got edited on two separate locations at the same time.
Verify and move before emptying the folders
If you still need the items which are listed there, verify if they still exist in your mailbox and also exist on the server by using Outlook Web Access when using an Exchange account or Windows Live Hotmail if you are using the Outlook Connector.
If they are not, then you can move the item to a folder of choice and see if the changes get uploaded now. If everything is in order, you can cleanup the Sync Issues folder if you want.