what if joe has no spesific e-mail domain for work? i am the admin of business account and i send and invite to joe@gmail.com, and he gots message [Join Company] 1-- when filling form he types business e-mail the same joe@gmail.com 2 -- and push "upgrade and join" 3-- gots this message "We are unable to activate your business account at this time. Please contact your business administrator"