While troubleshooting I finally came across the sync error code 8004DF03-0-0-560. Having a work through many solutions the final one that worked was opening the Run box (windows key & R) and typing Outlook.exe Safe:3
As I know, there seems no official method to achieve that, maybe you could try some third-party add-ins in Outlook to see if it could help.
Calendar Tools for Outlook
Personally, I would more willing to use Exchange email account and Archive emails which I need to local disk.