Notifications vary depending on the type of operation.
Add New
If "Send email invitations to users added through provisioning" is checked, newly added users will receive an email containing their Login information.
This option is checked by default.
Related: Changing the Send Invitation E-Mail settings for users added through Provisioning
https://teachme.jp/8/manuals/51167397
Update
No notification will be sent.
Delete
No notification will be sent.
Related: User Provisioning with Entra ID (Web Browser)
https://teachme.jp/8/manuals/51167437