Reset admin account password from another admin account
I have a client who has three users on her 2012 MBA. Two of them are admins. They've forgotten the password to one of those admin accounts, so, no problem, I figured: I'll just log in as the other admin account and reset the password. Went to SysPrefs, opened users, clicked the lock and authenticated. I can reset the password of the non-admin user, but the other admin user is greyed-out. Am I missing something obvious, or is there a rule that an admin account can't be unlocked from a second account?
[and] , then enter[ed] the admin name and password again," and "4. [Tried to s]elect [the] user name [in question] from the list of users."