Detect Duplicates Across Contacts and Leads Using Standard Rules

Do your sales reps create leads for contacts that are already in Salesforce, or the reverse? Two standard duplicate rules make it simpler to detect contacts and leads that duplicate each other. This change applies to Lightning Experience, Salesforce Classic, and all versions of the Salesforce1 mobile app.
Available in: Professional, Enterprise, Performance, Unlimited, and Developer Editions

If your org was created before Summer ’17, your default duplicate rules for contacts and leads each match only duplicates on the same object. However, additional rules that match duplicates across objects are available to activate in Setup.Standard Contact Duplicate Rule and Standard Lead Duplicate Rule, shown deactivated

In orgs created in Summer ’17 or later, the matching rules on standard contact and lead duplicate rules already match duplicates across objects.Standard Contact Duplicate Rule and Standard Lead Duplicate rule, shown activated