Implementing Inbound SMTP DANE with DNSSEC for Exchange Online Mail Flow

Thanks IanMcDonald for the comments on bogdanst95 question, because it makes the statement in the blog clearer. Maybe you should rewrite the part

"3^rd party gateways: customers using a 3^rd party email gateway on the inbound path that accepts mail for the tenant, does some processing, then relays it to Exchange Online will only be able to use this feature to secure email relayed from the 3^rd party gateway to Exchange Online if the 3^rd party gateway supports SMTP DANE with DNSSEC validation."

Som of my customers read it in a way, that 3rd party cannot send mail to EXO after migrating to DANE at all. We had to explain that some customers of our own product, that nothing will break here, as long as they use the new hostname as smarthost.  
The Scope of "will only be able to use this feature"  is only DNSSEC but not the inbound delivery at all