We currently use (mail enabled) Public Folders together with distribution lists to stora all project communication and notify all members.

The new Office 365 Groups would offer similar functionality, however we are missing ability to create subfolders in Group mailbox to organise the mailbox.

For example:
Group "Project X" displays in Outlook as:

Groups
>Project X

Which we would like to organise as following:

Groups
> Project X
>>Client
>>Subvendors
>>Internal

This would also require ability to drag and drop emails inside Group mailbox.

It would be nice to hide or remove the "Groups" on the left Tree in Outlook. And to also hide the Groups in the Address Book.

Note: We use Office 365 with AD Sync. We also use PowerBI Groups which created a whole load of groups. We don't want to see PowerBI groups in Outlook!!!

create a group (list) by multiselecting members in the address book

Groups are often used for contact lists where it is important to maintain privacy. It would be good to have an option for each group to always BCC members, even if the group is in the To field. The current scenario requires users to remember to put the group in the BCC field every time. An "always bcc" option would prevent mistakes.

In Outlook on the Web, when you enter a new calendar item in a group you have the ability to uncheck "Send a meeting invitation group members". In Outlook 2016 there is not that ability and the groups we have access to with dozens and dozens of members all get spammed with calendar notifications when entering a calendar item into a group calendar using Outlook 2016.

We would like that ability in Outlook 2016, the same that Outlook on the Web has (to uncheck "Send a meeting invitation group members").

Thank you.

An option to easily create a Distribution List or Contact Group from an existing Category - without having to enter each contact (Add Members) one at a time.

Group contacts are no longer being remembered in the last email history. Every time I send to a group I have to search for the email in my contacts list because Outlook is not remembering it any longer. Just started on 11/15/17.

Please make a"contact group" number the contacts in it. My internet provider limits the number of contacts to 100 per email. It is time consuming to have to count each contact group. As my contact groups have new people joining and old people asking to get off them it is difficult to keep track of how many contacts are in each group. Also increase the number of member allowed in a Contact Group. The maximum number should be at least as large as the Recipient Limit for Office 365 Business Essentials (500 recipients).

It is really confusing to have email sorted by newest first, and groups to be sorted by newest last. Please at least make it configurable, and consider make it the default. It is bad enough that email isn't ordered the same way on different devices.

Provide an option to Groups to sort and View emails using LastName, FirstName in Microsoft Outlook 2016

If the reading pane is off in Outlook you cannot open Modern Group messages. We would like to be able to double click on group messages to open them in a new window, similar how you can do with mail items.

add columns to Outlook Contact group dialog windows. Add Company Name, Full name, Tele phone contact.

group messages: when you send a group message, have a feature to mark who has replied to the message and who hasn't so that you can track who you still need an answer from.

Associate a dedicated Group inbox (like in SharePoint), which we could Cc or Bcc for each email that could interest the Group.

We would like a count of members in a contact group.

Presently, the Groups folders only shows conversations in the "General" Teams channel. Please provide functionality to display other channels and their conversations. Also provide the ability to drag/drop move/copy selected messages (single or multiple) from any folder in any store in Outlook to/from a Channel with appropriate confirmation prompts such as, "You are about to move X item(s) to/from 'Group Name/Channel Name'. Is this correct?".

When I receive an email with multiple DL, Outlook should show me which DL I am part of that is causing me to receive that email. This will cut down on clutter by allowing me remove myself from that DL if I do not want to receive the email.