How to send an email to the user according to the template after updating the user data in the admin panel?

Question

1C-Bitrix

In the user profile (in the admin panel) there is a field in which the administrator writes a message for the user, and after updating this record, send the user a letter stating that the record type has been changed, tell me how to implement this)

Answer 1

OnAfterUserUpdate and CEvent::Send