[keycloak-user] Cannot change the user's username in AD...

Hi everyone, Following situation: - Keycloak 1.7.0.Final - Login settings - Email as username ON - Edit username ON - AD Configuration - Edit mode : WRITABLE - Username LDAP attribute: cn (standard as all other attributes) I've been trying in vain to change the username/email of a user (via the account application or via the admin console) - only the mail gets changed in AD and not common name? Is there is a particular setting I need to configure? Thanks, Adrian