An error occurred while saving the commentPaul Widdowson commented
Hi folks - this is quite an easy one (well, it was for me...).
Go to "System Preferences" then "Users and Groups". You'll see a tab for "Passwords" and one for "Login items".
Select "Login items" and you'll see the Onedrive application listed. Simply select it and click on the "-" minus button below to remove it from start up. You may have to do the "click on the lock to make changes" thing, but you all sound like grown ups.
Hope this helps!