By default a Lync enabled account within a Lync/Exchange 2013 environment will be enabled for UCS (Unified Contact Store). This means that the Lync contacts get saved in the Lync user’s mailbox and not the Lync database. In order to get a list of the contacts associated with these accounts you have to export data to a zip file with some debug Lync commands and, even then, the information is buried in a hard to interpret XML file.
Continue reading