Multi User Magento 2 - Email Notifications
In the Admin Panel, the admin can set global settings for email notifications and decide who should receive order emails.
Go to Stores → Configuration → Subaccounts Configuration → General Options.
Beside the global settings, both the Admin and Master Account may decide if a specific Sub Account should get emails or not.
See below for how it looks from both sides (Admin and Master).
Admin Panel (back-end)
Sub-users edit/create form as seen from the admin panel.
Store View (front-end)
Sub-users edit/create form as seen from the frontend.
Please remember to Save after create/edit Sub-Users!