Lync – Add user error: Filter failed to return unique result

Many of us saw the following error when we add user on Lync Server using Lync Control Panel or Powershell: Filter failed to return unique result, “[SipAddress : sip:email@domain.com] [LineURI : tel:+15555555555] [PrivateLine : tel:+15555555555] “ I created the following commands and they always help me to find the conflicting number.  Just replace the number 15555555555 with…