This task searches address book for contacts. The following are "Find Contacts" task properties:

Filter: defines a condition each found contact should match to be included to result. To build expression - use a self variable to denote a single contact. For example, expression self.firstName LIKE "John" allows filtering contacts to keep only contacts having "John" as first name. Check the Predicate Format Syntax article for the description of condition format.

Limit Max Count: defines whether limit number of returned contacts 

Max Count: maximum number of contacts to return (applicable only if the "Limit Max Count" is ON)

See also:
Contact
Common Task Attributes
Task Options
Variable Types