Users who’re not Enterprise Voice enabled can dial out when PreventPSTNTollBypass is true in Skype for Business Server 2019

Applies to: Skype for Business Server 2019


When the PreventPSTNTollBypass parameter in voice policy is set to true and the AllowNonEnterpriseVoiceUsersToDialOut parameter in conferencing policy is set to false in a Microsoft Skype For Business Server 2019 environment, users who’re not enabled for Enterprise Voice unexpectedly can dial out from a conference.


To fix this issue, install the December 2019 cumulative update 7.0.2046.151 for Skype for Business Server 2019, Front End Server and Edge Server.