Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_43227 ( "Protocol" text, "Creator" text, "License" text, "Transport Layer Security" text, "Bulletins to all contacts" text, "Batch file sharing" text )

### Question ###
Were there Bulletins to all contacts of the proprietary license created by Microsoft with no transport layer of security?

### Accurate SQL ###

SELECT "Bulletins to all contacts" FROM table_43227 WHERE "Transport Layer Security" = 'no' AND "License" = 'proprietary' AND "Creator" = 'microsoft'