today I realized that the search builder does not provide access to custom multiple-record-fields. Thus I'm wondering how it's possible to search for contacts having at least one record of such field.
Thanx in advance // nielo
In a stock installation of Civi 4.6, I don't think this is possible. However, this is possible in Civi 4.7: https://issues.civicrm.org/jira/browse/CRM-16137
This is a very simple patch, so if you want this functionality today, check this out: https://github.com/civicrm/civicrm-core/pull/5435/files