This behavior is by design, to preserve the integrity of the system. We cannot conclusively verify the identity of the member of a grouped user using only a temporary password, since multiple users within the grouped user could have the same temporary password. So, we had to disallow their use.
Questions?
If you have any questions or need some help, we would be happy to assist. Open a case at help.scorpionsoft.com or send an email to support@scorpionsoft.com.