When you update record owners in bulk using the Salesforce API — for example, through the Apex Data Loader — the standard Send Notification Email alert that is available in the Salesforce user interface is not triggered.
This is expected behavior and is by design. Salesforce suppresses these notifications during API-based updates to prevent sending an unmanageable number of emails during large data operations. It is not advisable or scalable to send individual notification emails to users when mass-updating record ownership.
As a workaround, administrators can send a single manual email to affected users informing them that record ownership has been transferred. Users can then Create a Custom List View in Salesforce Classic, Create a List View in Lightning Experience, or Create a Report to view and work through the newly transferred records.
Warning: Always back up your data before performing any data operation. See Export Backup Data from Salesforce for more details. Test with a small subset of records first to verify the operation is successful before running on your full dataset.
AND(Notify_New_Owner__c=TRUE, ISCHANGED(OwnerId))Note: If a user changes a record owner via the UI and selects Send Notification Email while the checkbox is checked, duplicate notifications may be sent. To prevent this, restrict the rule to specific users or profiles by extending the formula:
AND(Notify_New_Owner__c=TRUE,Replace
ISCHANGED(OwnerId),
OR($User.ProfileId='00e30000001HH9X',
$User.Id='00530000003xqAa'))
00e30000001HH9X with your profile ID and 00530000003xqAa with the specific user ID in your org. For help locating these IDs, see How to Find a User or Profile ID.000381646

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