Released as open source by NCC Group Plc - https://www.nccgroup.com/
Developed by Chris Nevin, email@example.com
Released under the AGPL license https://www.github.com/nccgroup/carnivore/license
Carnivore - V.1.0.4 Microsoft External Assessment Tool
Overview: Carnivore is an assessment tool for Skype for Business, Exchange, ADFS, and RDWeb servers as well as some O365 functionality. Carnivore includes some new post-authentication Skype for Business functionality.
In general the tabs will unlock in-line with what functionality you can use. Ie - the post auth options will unlock after you have discovered valid credentials.
Defcon 28 presentation: https://www.youtube.com/watch?v=LJFuydx-HtE