I have the exact problem that is discussed here - Transfer owned folders | Community
The account that is using OAUTH has all Co-Admin management for user and file access based on what is seen in the Manage Users.
And the application appears to have the needed rights.
However, when attempting to move the content to an Admin account (which we do within the web portal) a 403 forbidden is received.
The process seems to allow the transfer to the OAuth user so member to Co-Admin which doesn’t correlate with the error that is received.
I have not tried transferring ownership of the folder to the admin account that we are using for all the other folder storage but really feel like that is not going to work. I really wish there was an easier way to do this but if anyone has done this and can validate that it will work, I would appreciate the response.