Thank you Andreas for your reply.
But I have 100+ servers that I need to RDP. In this case are you saying I need to add my credentials for all those 100+ server by this command: cmdkey /generic:"<servername>" /user:"<username>" /pass:"<password>" ?
Also I tried what you suggested and it is not working for me. Still it is prompting me to enter password after getting the RDP window
If you dont mind, can you please tell me how ?