setting in a/d where I can set an a/d account to password expire in x amount of days.

hello all I thought this would be an easy google search and set somewhere in the end users a/d account. basically I am testing a password reminder policy. and want to set my test account password to expire in x amount of days. there is already a group policy for p/w to expire in 45 days. I have a reminder policy set for 7 days but of course I want to test it and I dont want to wait 45 days to test, can I change time on pc or something there has to be somewhere in a/d or something.