This Cmdlet for Skype for Business allows you to Enable or Disable a Specific Public Provider. A public provider is an organization that provides SIP Communication services for the General public. So if the Organization enables communication with a Provider “Yahoo”, then the Organization can communicate with any Public User who has a Yahoo Account.
Set-CsTenantPublicProvider has two parameters, “Tenant” and “Provider”. Tenant is where you specify the Tenant ID and Provider is the Public Provider which you want to enable
Set-CsTenantPublicProvider -Tenant “” -Provider
Set-CsTenantPublicProvider -Tenant “123” -Provider “WindowsLive”
This would Enable the Public IM Provider WindowsLive for the Organization Tenant “123”.
Set-CsTenantPublicProvider -Tenant “123” -Provider “”
Since the Provider attribute is empty, all the public IM Providers would be disabled for the Tenant with ID 123.