Hi Brian,
Thanks for your reply and advice.
I'm trying to help someone who has succumbed to exactly the same issue. The Cloud Backup process, once started, has completely messed up their local Outlook PST file(s) mapping, local password safe storage, their external drive backup, and various other things dependent upon previously 'defined paths'.
Your solution of deselecting the folders (i.e. Desktop, Documents, etc) and restarting the PC has not remapped the folders back, nor has it actually stopped the OneDrive syncing which seems to continue on unhindered.
The most annoying thing is that there doesn't seem to be a way to undo this simply, and without fearing that some files have moved to the Cloud and no longer be retained locally, etc (i.e. data loss).
Furthermore, there was no prior or useful warning of potential side-effects that this kind of thing would happen when this person thought it would be a good idea to have Cloud Backup ...
Not impressed with this 'destructive change' (though obviously acknowledge you didn't implement it, just thought the above might help finetune your advice, or lead in another direction? MS really needs to think this stuff through better).
Regards,
JC.