You can deactivate lookups for your organization to prevent Sourcing Automation users from performing email or phone lookups for prospects.
Deactivate lookup credits
Navigate to Configure > Sourcing Automation.
On the Sourcing Automation page, scroll to General settings.
Click to uncheck Use lookups to find prospect email addresses.
Lookups are now turned off for your organization.
When Sourcing Automation users try to update their email lookup priority, they'll see an alert that lookups have been turned off for your organization.