ClientVersions table in Skype for Business Server 2015
The ClientVersions table is a supporting table that stores a list of the various client types and versions that have participated in sessions recorded in the database. Each record in the table represents one client version.
||Unique number identifying this client type and version.
||Specifies the type of client used in the session. See the UserAgentDef table for more information.
This field was introduced in Microsoft Lync Server 2013.