Last tested: April 2021
No Password Reset
Most likely, this user doesn't have a Looker email credential. Without an email credential, they can't have a password.
This happens if the user was set up via Google Auth, SAML, LDAP, etc. This means that any management of passwords will have to be done in those external providers, not in Looker.
If you need to add email credentials to users who have only external authentication credentials, you could follow the steps in Enabling the Alternate Login Option
No Edit Button
The Edit button will be missing for users who have had their credentials deleted (happens with rogue API use, for example)
In order to get that button to reappear, you will need to reassign credentials.
This content is subject to limited support.