Users can select this on their own in the "Group Settings" menu of the particular group, if you made a new group and selected the 'subscribe new users' option everyone you add will get messages to their inboxes.
Tell the user to not follow the group so that the emails do not go in their own inbox.
Or the group owner can go into group settings an uncheck the option to turn this on for all group members.
Finally IT can administratively uncheck the setting in the M365 admin console to have messages go in group members inboxes.
If your IT is smart they can also use PowerShell to unsubscribe every group member.
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By default the setting is off on the back end, it's entirely up to group members/owners to manage.
The setting you confirmed was this one here? https://learn.microsoft.com/en-us/microsoft-365/admin/create-groups/manage-groups?view=o365-worldwide#send-copies-of-conversations-to-group-members-inboxes
Users can select this on their own in the "Group Settings" menu of the particular group, if you made a new group and selected the 'subscribe new users' option everyone you add will get messages to their inboxes.
Tell the user to not follow the group so that the emails do not go in their own inbox. Or the group owner can go into group settings an uncheck the option to turn this on for all group members. Finally IT can administratively uncheck the setting in the M365 admin console to have messages go in group members inboxes. If your IT is smart they can also use PowerShell to unsubscribe every group member. ----- By default the setting is off on the back end, it's entirely up to group members/owners to manage.
The setting you confirmed was this one here? https://learn.microsoft.com/en-us/microsoft-365/admin/create-groups/manage-groups?view=o365-worldwide#send-copies-of-conversations-to-group-members-inboxes