A family of Microsoft word processing software products for creating web, email, and print documents.
I've been having the same trouble with excel files opening as read only.
I work on one PC and then save so that I can open it on a PC at another location. After much frustration, pointless reading and one desk bang I figured it out.
I saved my file on PC#1 which uploads to onedrive then I click "file" & "close". Now when I open the file on PC#2 it downloads & opens as writable.
If you just close the excel window with the "X" PC#1 seems to keep the file open in memory and opens as "read only" on PC#2
Works for me ;)