Default value apply mapping rule

You use this rule to ensure a value is not the default value.

The rule uses the value’s type to determine what the default value is. This enables value types and object types to be supported.

You usually use this rule to prevent actual values being replaced with default values. For example, imagine you are trying to update the phone number, which is stored as a string, on an existing contact. The contact already has a phone number specified, but the source object does not have a phone number set on it. This rule can be used to ensure the existing phone number is not overwritten with a null string from the source.