CmdID / PowerShell / Cmdlets / Set
Set-CsOnlinePstnUsage
Modifies a set of strings that identify the allowed online public switched telephone network (PSTN) usages. Microsoft Teams PowerShell reference
From the Microsoft Teams PowerShell reference 4 parameters Its page in the reference
Parameters
-Confirm, -cfPrompts you for confirmation before running the cmdlet.-IdentityThe scope at which these settings are applied.-UsageContains a list of allowable usage strings.-WhatIf, -wiShows what would happen if the cmdlet runs.