Regular Users that have Share permissions, can control (switch on or switch off) notification settings of users they provide folder access to.
Scenarios for user notification can include getting an email for cases of:
Note: Notification triggers and direction (Sender/Recipient) are configured in FOLDERS > [Change Notification Panel].
When you share a folder with another user (Secure Folder Sharing) MOVEit Transfer will send out an initial notification. This behavior occurs independent of the upload notification settings you assign to the folder.