After too many failed sign-in attempts, Argenta locks the account. Changing the person's password will not let them back in, because the lock is separate from the password. You have to clear the lock itself.

Unlock the account

1. Click Settings, the gear at the top right, and choose System Users. That opens Our Argenta Users.
2. Find the locked user in the list.
3. Click the Unlock icon on their row.
4. Argenta confirms with "This account has been unlocked." They can sign in again straight away.

You need to be a Master Admin or Subscription Manager to see the Settings menu at all, so if it is not there, ask whoever administers your account to do this for you.

If the person has also forgotten their password, unlock the account first, then have them set a new one from Help Center at the top right, under Change Your Password.