We are working on providing the ability to change the email address (both primary and secondary) associated with a group.
Roadmap item: https://products.office.com/en-US/business/office-365-roadmap?filters=&freeformsearch=27891&featureid=27891Anonymous commented
This is an absolute must.
Thanks for your feedback. We are currently thinking about this. Can you please let us know what scenarios your organization uses shared mailboxes for and what options do you use. This will help us.
Hello, I’m updating the status of this UserVoice suggestion back to “thinking about it”, as it appears the previous status update was misleading. The core of the suggestion is to allow folders.
Keep on posting on this suggestion to create folders within group mailbox.