Wednesday, June 17, 2015

How to restrict calling PSTN numbers from Skype/Lync Mobile Client

If you’re looking to restrict Skype/Lync Mobile Clients from dialing PSTN numbers and allow Enterprise Voice enabled users to make PSTN calls only via Desktop Clients you will need to set a mobility policy.

Set-CsMobilityPolicy -Identity “site:Redmond” –EnableIPAudioVideo $False

When set to “False”, prohibits the user from making Lync voice calls using the mobile device by removing the dial pad option from the Lync client. The default value is “True”, meaning that VoIP calls are allowed.

Additionally you can disable "Call via work" for this policy as well. Call via work is the feature that if enabled will allow mobile users to make PSTN calls through your PBX. So if you want to block all PSTN calls your command would look like this; 

Set-CsMobilityPolicy -Identity “site:Redmond” –EnableIPAudioVideo $False -EnableOutsideVoice $False