Split from this thread.

I tried renaming the calendar as suggested, and all it did was blank out my calendar on Live Mail totally.  I renamed the file back to my Hotmail ID, and it went back to my calendar as I have updated it in Live Mail.   However, the calendar entries that I changed recently have not been copied to the calendar version on One Drive.   Entries my wife added are there, but are not being imported to Live Mail.

I tried repairing Live Essentials via the control panel as suggested, but still no LIVE MAIL calendar entries have been synced with One Drive in either direction.

I am wondering if Microsoft dropped support for syncing the Live Mail calendar.  I've gotten some emails asking me to switch from LIVE MAIL to MAIL.  However, I tried MAIL, when I got my new laptop computer and it was a giant step down from LIVE MAIL.  I like the function in LIVE MAIL and much of it is not in MAIL.  I intend to stay on LIVE MAIL as long as it works.   This maybe the first bit of function they took away to get people to move to MAIL.