A Microsoft file hosting and synchronization service.
Hi Håkan Vads,
Welcome to the Microsoft Community.
On OneDrive, copying a folder X to a folder Y is effectively the same as creating a copy of X in folder Y.
Y is not updated when you change folder X. This is because they remain independent of each other and does not imply any synchronization connection between them.
If you need to keep folders synchronized between different OneDrive accounts. Creating OneDrive shared folders is a good way to do this.
Unfortunately, OneDrive does not currently have the ability to synchronize two folders with each other under the same account.
Perhaps you might consider submitting feedback in the OneDrive app to let the developers know your thoughts and needs.
Right-click the OneDrive cloud icon, select Settings & More, then select Feedback.
Best regards,
Ian - MSFT | Microsoft Community Support Specialist