Email This Post June 21, 2012 – 12:03 am Here's today's AdExchanger.com news round-up... Want it by email? Sign-up here. Knights Of The DNT Ad Age's Michael Learmonth says that ad holding companies among others have been reaching out to Microsoft to re-consider their decision to make their Do-Not-Track functionality default to "on" in the new version of IE. Learmonth adds, "High-level Publicis execs including Vivaki CEO Jack Klues have reached out to Microsoft about the issue as well. Both WPP and Publicis are big buyers of Microsoft ad inventory and handle Microsoft advertising business." Read it. This week's W3C Tracking Protection Working Group Meeting may be a tipping point in the DNT discussion. Today's IAB Ad Tech…