Outlook development is not currently supported here on QnA. They're actively answering questions in dedicated forums here.
https://social.msdn.microsoft.com/Forums/Lync/en-US/home?forum=outlookdev
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-msoffice_custom
--please don't forget to Accept as answer if the reply is helpful--