Table schema:
CREATE TABLE table_name_43 (bulletins_to_all_contacts VARCHAR, creator VARCHAR, transport_layer_security VARCHAR, license VARCHAR)

Question: Were there Bulletins to all contacts of the proprietary license created by Microsoft with no transport layer of security?
SQL: SELECT bulletins_to_all_contacts FROM table_name_43 WHERE transport_layer_security = "no" AND license = "proprietary" AND creator = "microsoft"