I read somewhere that we can add external user in Azure AD by sending invite. but can it possible to use license of source tenant? means if external user has CE sales license in his/her tenant (let's say tenant A) and he/she has been invited to other tenant (tenant B). and tenant B doesn't have license for him/her. In that case user would able to access CE of tenant B? if not, is it possible to use client's CE without consuming license? because client doesn't want to pay for licenses consumed for developer.