How should you complete the relevant Windows PowerShell script?

Explanation/Reference:
Explanation:
We need to reconfigure all the meetings/conferences that require authentication or in other words, all meetings/conferences that do not allow anonymous users.
We do this by running the Get-CsMeetingConfiguration cmdlet without any parameters to return a collection of all the meeting configuration settings currently in use. That collection is then piped to the Where-Object cmdlet, which selects only those settings where the AdmitAnonymousUsersByDefault property is equal to false.
Now that we have all the meetings/conferences that require authentication, we can use the Set-CSMeetingConfiguration to reconfigure those meetings to enable the users to bypass the lobby by using the PstnCallersBypassLobby = True parameter.
References:
https://technet.microsoft.com/en-us/library/gg425875.aspx