When using a mobile device in combination with Lync 2013 or Skype for Business, presence is not supported by Microsoft. The mobile device presence app of Dantelo makes the difference and provides real-time line- and connection status information from the GSM device into: the Microsoft Lync 2013 client and the Microsoft Skype for Business client. This application offers Lync or S4B users the capability to view the availability of those colleagues who use a mobile phone (device). The Mobile Presence solution introduces additional availability information (‘features’) in Lync and Skype for Business: available on mobile, busy on mobile, busy on mobile abroad (“Country”), the phone is switched off, etc.. This application ‘publishes’ mobile and user presence changes directly into a Lync 2013 | S4B enterprise server without any involvement of external servers.