Awesome chart! While you are updating it, you may also want to reflect that Microsoft changed "Lync" to be called "Skype for Business" in April 2015 - https://technet.microsoft.com/en-us/library/dn913785.aspx http://blogs.technet.com/b/scottstu/archive/2015/04/13/contr...

As far as I know "Skype for Business" is still using Lync's protocols, so your line would still be accurate.