by Woogon Chung.
Hello all,
To workaround the error message when you create the second user with the same email addres, I created an email account (via the ISP, or SMTPserver setting) and forwarded the second email account to the first email account. In other words, I workaround the issue by creating another email account for the second person and have him forwarded the ISP-provided email to his real email account.
woogon