Add a feature to ownCloud

I have ownCloud installed on my server. Now I would like to connect my various Onedrive for Business accounts with my ownCloud and mount them as external storage. It should be possible to access Onedrive from my ownCloud and also be able to move or delete files. For each ownCloud user a new folder should be created on the respective Onedrive for Business account and the user should only have access to this folder. All Onedrive for Business accounts should be grouped together so that only one folder is displayed. What's important is to limit how much memory can be used by the user on each Onedrive for Business account. I would be very happy about solutions and offers. FYI: I do not have ownCloud Enterprise version. I can not afford this.