In a Microsoft Skype for Business Server 2019 environment, consider the following scenario:
- You enable anonymous PSTN activation by running the Set-CsDialInConferencingConfiguration -AllowAnonymousPstnActivation $true cmdlet.
- You schedule a private conference and set the access level as “Anyone”. Note that the meeting must be a scheduled conference. Because if you use the Meet Now feature to start a meeting, the Skype for Business user will join the conference first.
- A PSTN user dials in to the conference and make sure that you are transferred to the conference without waiting for an authenticated user.
- You may join the conference from a Skype for Business client and make sure that the PSTN caller is already in the conference.
In this situation, the PSTN user is placed in holding until a Skype for Business user joins the conference. It’s expected that the PSTN phone should be transferred to the conference without waiting for an authenticated user.