If the email is based on the domain of the partner, it is not counted as the user license.

If only this were true

I'm with @KevinJ of Kansas -- I wish this were true.

This is true because a partner told me that. They wanted to create an email for me on their domain so it doesn't count as the license in the customer account.

Well they were mistaken. Worked at RSM which was a partner of the Year. No such option existed for us.

Oh Wow!