This is what it says when adding a subdomain and connecting with LC. However, currently, everyone who does this if failing MS Office users. I spent hours reading and "on behalf of" topic and could not find a solution. 99% of our clients use outlook, hence we need to fix how this looks on Outlook.
1- Fix "on behalf of" for the root domain email
2- Show header text (Contact <contact@go.domain.com> instead of contact@go.domain.com) at the top of the email - should be fixed for both subdomain emails and the root one