[Samba] Allow unencrypted TLS LDAP query

[Ricardo Pardim Claus]

Dear 
It is possible to configure Samba 4.4.5 to accept queries that do not use TLS? 
I'm having trouble authenticating the Proxy / SquidGuard in AD Samba 4.4.5. 

I get this error: 

(squidGuard): ldap_simple_bind_s failed: Strong(er) authentication required

I read the wiki Samba, the new versions are working with authentication TLS encrypted connections. 
It is possible to configure Samba to return to receive authentication in normal mode?