To activate the Move To feature you have to assign you Dentiray Web User edit permissions. If you are an admin user in Dentiray Web you can click on your user name in the upper right hand corner and select Users from the menu.
If you don't see Users on your menu, you will need to browse to your https://PGID.Dentiray.net and sign in with your admin user and password. Once logged in as an admin, you can activate Edit for all other users. My PGID is 4002 so I would go to https://4002.dentiray.net to access mine.
Then you can select your user, select the Privileges Tab on the right, and make sure Edit is selected and then save.
Once that is completed you will be able to see the Move To function in Dentiray Web.