is there any way to have an user using the computer when your remote desktop to it?

If you are willing to consider an alternative to Microsoft remote desktop, try RealVNC. They have a free server and viewer that will allow this. Overall, I consider Microsoft's RDT to be better than the free RealVNC.

If you are willing to consider an alternative to Microsoft remote desktop, try RealVNC. They have a free server and viewer that will allow this. Overall, I consider Microsoft's RDT to be better than the free RealVNC. I have to agree with ebpdoug I have been using RealNVC for a very long time great software and easy to use.