Microsoft automatically upgraded me from Windows 10 to Windows 10 Creators. I promptly lost my Outlook 2010 Calendar with the error message "cannot find the folder." Multiple clicks (OK, 30) on the calendar button and epic cursing finally brought it up, but scrubbed of all data entries save for repeat entries. From Outlook, clicking on File, Account Information, Account Settings, Data, reveals three calendar files--iCloud, Outlook, and my email address--all of which are updated as of today, rendering them useless.
Does anyone have any ideas on how to get my calendar data back? Microsoft support is no help.