Where can one find documentation for Lync Server 2010 Commandlets?

Documentation related to PowerShell CommandLets for Lync Server 2010 administration including Synthetic transactions is available at https://technet.microsoft.com/en-us/library/gg398867.aspx 

You can view the CommandLets organized by category at https://technet.microsoft.com/en-us/library/gg398306.aspx