Cached password from LDAP authentication?

Hi,

I have grafana installed using LDAP authentication, but when the user change their password on AD and try to login on grafana, only the old password works. the new password only work if I delete the user and create again.
There is a way to always try to authenticate on AD, and not use local password first?
I am using grafana 4.3.2

This sounds like you have configured something incorrectly. Grafana can be configured to create local accounts or it can be configured to use LDAP for auth. What does your config look like and your ldap.toml?