When folders have been redirected with the “Grant user exclusive rights” option, the Admin user needs to take ownership and change the permissions to be able to access the files (to move the share for example).
Now, assuming you have a directory structure like: x:\docs_share\username, then just set the permissions you need on x:\docs_share, cd to x:\docs_share and run:
takeown /f <username> /a /r /d Y
icacls <username> /reset /t /q
icacls <username> /grant <username>:(OI)(CI)F /q