If you have a RDP (Remote Desktop Protocol) file to connect to a remote server and you saved your password, there is an easy way to reset it. Generally even the password is wrong, it will not ask you again to enter your credentials.
To reset, right click on .rdp file and select edit. One Windows PC this should not bring up notepad, rather open a small window with a check box, “Always ask for credentials”. Check this box and click ok.