Hi Jay,
thank you very much! Esp. you answered so quickly :D
I just tested with a colleague who has limited admin permission to restore emails to groups. It gave me error which indicates lack of permission. Hence the email in this group :P
I guess we either need to set up a server to migrate gmail emails to Groups, or run the commands on my laptop :( I already did that earlier this year, running GYB on my local machine to restore for 6 groups for 2 weeks..... a burden for my laptop and it sometimes timed out or had connection failure.
If new comers join the Google Group and there is no historical emails, they would ask......
Anyway, thanks for confirming my guess! I agree GYB is too complicated for end users.
Thank you!
Ella