To configure SharePoint to receive the url of the email alerts in ADFS zone format, it is necessary to execute the following PS:
$wa= get-spwebapplication “https://urlwebapp”
$wa.useExternalUrlZoneForAlerts = $true
$wa.ExternalUrlZone = “Intranet”
You can change the zone to set it within your ADFS zone in the SharePoint farm
Albandrod's Memory 