While it has happened to everyone, it still isn't fun. Your password is expired or not working.....what do we do from here?
Well, here is the place that you can change and update your password: https://account.activedirectory.windowsazure.com/ChangePassword.aspx
Make sure that you are following the rules outlined in your Company Handbook and NEVER WRITE THIS DOWN!!!
The page outlined above is easy to use, and if you have any issues, make sure to start a ticket here.
One of the Support Agents will be able to help you get that moving.