Use Groups in the Outlook mobile app; Outlook Groups app is retiring

In our opinion, this is a very bad idea. First of all: The Outlook App is forbidden here at our site for security reasons. This is a management decision. We might be able to undo them, but it'll take a few months. And in the meantime? And there is another problem. Mail and calendar are natively connected directly to the smartphone. For mail, calendar and people we don't need the Outlook App. So notifications for appointments and mails are completely disabled. 400 users are affected.

How does this now work with notifications for new group mails that are not followed in the Inbox? Some of us are in up to 30 groups, but only have notification enabled for 4 or 5 groups.

And what about mobile data consumption? All users have limited plans. But due to the interlocking with mails and appointments, all appointment invitations and all (partly very long) mails are loaded twice (once for the native mail client and once for the Outlook app), or how does it work? Please reconsider the decision. It is not customer friendly.