See explanation below.
Explanation
1. Go to Navigation pane > Modules > System administration > Users > Users.
2. In the list, find and select the desired record.
3. On the Action pane, click User options.
4. Click the Workflow tab. Make sure that the Notifications section is expanded. In the Notifications section, you can specify how you want the user to be notified about workflow-related events.
5. In the Line-item workflow notification type field, select an option.
- Grouped - Notifications for line items are grouped into a single email message.
- Individual - An email message is sent for each line item.
- If you want the user to receive notifications in the client, select the Send notifications in email check box.
6. Click Save.
Reference:
https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/fin-ops/organization-administration/tasks/users-recei