I created a password protected file in Excel on my home desktop PC and filed it in my OneDrive folder. On my laptop I can obviously see the file in my Onedrive folder and I can open it because I know the password! But I cannot make changes to it from the laptop like I can from the desktop. I do not understand this business about "share" and "get link" - even then I have to make a different copy on the laptop. Can I not simply authorise my laptop to use and amend this file in my OneDrive as if I were using it on my desktop?