I think your solution would work for Windows 8 as well, but we are focused on Windows 10 here.
Standard GPO redireciton in AD for users my documents to a network share hangs Windows 10, places a failure in folder redirection in the eventviewer and the documents location remains local. GPO - User Configuration\Policies\Windows Settings\Folder Redirection
How do I get a to GPO redirect "my documents" to a \\server\users location, and have it located in Windows 10 libraries, for the masses?
We know it can be done manually and it works in Windows 10, but we need a SCRIPT or GPO solution to change My Documents from LOCAL to "\\server\users\%username%\my documents"
"The Group Policy Client Side Extension Software Installation was unable to apply one or more settings because the changes must be processed before system startup or user logon. The system will wait for Group Policy processing to finish completely before the next startup or logon for this user, and this may result in slow startup and boot performance."