You can follow below steps to reset FTP user password.
								- Open “Computer Management” on Windows server.
 - On the left pane click on Local Users and Groups >> “Users”.
 - You will get the list of all the created FTP users in right side bar.
 - Right click on particular user and select “Set Password” option
 - Enter your new password and chnage password of your user.
 - At last save the changed password.