When I change the username of the Community user ( any community license) from user record page in SFDC , I don't see any email notification from salesforce sent to the user notifying of username change. Same scenario when executed for internal users, SFDC sends email notification. I also checked email logs and don't see any notification email in the log.
Is this the default behavior ? Is there a way to send out notification when username is changed for community users ( from standard SFDC user record or from user record update from data loader)