Do you know any security testing tool to test Outlook plug-in?

I need to test MS Outlook plugin for some security problems. There is also a website with similar behaviour, I've already test it and know I want to know if this vulnerabilities are also in plugin. I dont know how can I see the communication beetwen server and this plugin. I wanted to try something like testing web app with Burp.

I tried to use wireShark but I cant track communiacation of this plugin or I just cant find it, because I can only filter with IP number and I dont know how to check it, is there any ip number, should it be the same as website IP?