On shark there is a schript called AD-pwd-experation.sh if you run this script it will tell you in how many days your password will expire.
Your Password will expire in 28 Days
When you login with ssh on Shark and your password expires within 5 days you will get a warning that your password will expire.
To change your password if it's not expired you can type the command passwd
Current Kerberos password:
Enter new Kerberos password:
Retype new Kerberos password:
passwd: password updated successfully
If your password is expired and you can not log into Shark any more, you can use a website to change your password.
If you use this URL please use as domain : RESEARCHLUMC
Thus your Domain\username would be : RESEARCHLUMC\USERNAME