Report is saved in the location the command was executed. The command will create a HTML RSoP report with default values. The /H parameter of GPResult command is used to generate RSoP in HTML format. Click Apply and Proceed to commit the pending operations. Specify the new drive letter for your partition. Open AOMEI Partition Assistant, right click said partition and select Advanced > Change Drive Letter.
The parameter is incorrect in Windows 10 when change drive letter 1.