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Lync policy setting

The Lync policy setting controls the which ports and how many can be used. The 
ClientMediaPortRangeEnabled
 flag controls whether there are restrictions for used ports.
  • ClientMediaPortRangeEnabled
     = 
    false
    : This mode specifies that there are no restrictions for used ports
  • ClientMediaPortRangeEnabled
     = 
    true
    : This mode requires that you enable enough ports for a mass communication device.
To view the Lync configuration, complete the following steps:
  1. Open a command window and run as an administrator.
  2. Enter the following command to view the Lync configuration: 
    Get-CsConferencingConfiguration
    .
To enable the ports, set the value of 
ClientAudioPortRange
 to the recommended value of 1000:
  1. Open a command window and run as an administrator.
  2. Enter the following command to set the port range: 
    set-CsConferencingConfiguration -ClientAudioPortRange 1000
    .