This is in our roadmap and in development.
We’re currently looking how how you can create and manage preservation and deletion policies that affect Office 365 Group mail and files.
Keep track of this on our roadmap: http://fasttrack.microsoft.com/roadmap?filters=#I-61261
We agree and we’re working on it! Please check out the latest announcements and videos here:
Apologies for the previous irrelevant admin response. We’re still thinking about this one.Michel Kennis commented
admin: please read the comments here. Your solution is not right. For example, the employees of a departement should not of the possibility to opt-out of their Departement O365 group. Please review your answer.
We have announced that Group Owners will be able to leverage existing groups to drive membership in Office 365 Groups.
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.Michel Kennis commented
too bad you can't "like" a comment here. So let me copy/paste the best comment below. Being able or not to reply with the group email address is a must. Most use Shared Mailboxes as 'not personal service mailbox' for the outside world. For example customer_care@ …
A better feature might be to have a third option which would combine the features of both shared mailboxes and groups, and have admin options to enable/disable some of the features.
(These are not available in shared mailboxes)
Allow use on mobile: Yes/No
Add external users: Yes/No
Delete messages for all: Yes/No
(These are not available in groups)
Reply as group address by default: Yes/No
Accept email from external users by default: Yes/No
Allow mailbox import: Yes/No
If the idea is that groups will eventually replace shared mailboxes, then these options are a must!