These instructions are for Mines ADIT-joined Mac's.
If you have an Intel Mac with FileVault (encryption) enabled and you have updated/changed your Mines password, you may no longer be able to logon to your Mac at the FileVault login screen with the new password. To remedy this, do the following:
Logon to your Mac with your username_a account or other admin account.
Open Terminal from Finder > Applications > Utilities.
Type the following commands:
sudo fdesetup list (you will need to type your username_a password, when prompted)
Note the list of user names and identify your account in the list so it can be used below.
sudo fdesetup remove -user username
Substitute 'username' shown above with your actual username.
sudo fdesetup add -usertoadd username
Substitute 'username' shown above with your actual username.
When prompted for 'username', type the admin account (username_a) and admin password and then your new Mines password.
You can test the logon by rebooting and typing your new password after clicking the FileVault icon at the logon screen.