The link you followed will bring you to this page:

http://teams.microsoft.com/l/meetup-join/19%3ameeting_NWI3OWM2ZmUtZGY5Zi00YTI4LWFlOTQtOWMyYWI2MTk3N2I4%40thread.v2/0?context=%7b%22Tid%22%3a%2234c64e9f-d27f-4edd-a1f0-1397f0c84f94%22%2c%22Oid%22%3a%222e3592b6-310b-4276-b3b0-1334e138c182%22%7d