the complete certified vendor list

3rd Party Vendors (June 12th, 2015)
PV = Preferred Vendor (Pub-Pay agreement)
Vendor
AdapTV
Adform (PV)
Rich Media
Video
VAST 2.0
VAST 2.0
VPAID 1.0
Mobile
Compliance
Standard
Expanding Rich Media
MRAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
SafeFrame
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
AdInterax (Y! TPV)
Standard
In-Unit Rich Media
Expanding Rich Media
Float
IAB Billboard
Custom Header
IAB Filmstrip
Floor
Skin
Outlook.com Expanding Rich Media
Standard
In-Unit Rich Media
Float
IAB Billboard
Standard
Adition
Standard
Skype In-Unit Rich Media
SSL
OOB
Adman
Standard
In-Unit Rich Media
Expanding Rich Media
Float
Standard
In-Unit Rich Media
Expanding Rich Media
Float
Standard
In-Unit Rich Media
Expanding Rich Media
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
Skype HP Masthead
Skype Expanding
SSL
OOB
Standard
Expanding Rich Media
MRAID 1.0
SSL
OOB
SafeFrame
AdGear (Bloom Digital)
Admixer
Admotion (PV)
SSL
VAST 2.0
VPAID 1.0
Float
IAB Billboard
Custom Header
IAB Filmstrip
Billboard Expand
Collage
Flip
Floor
Skin
Outlook.com Expanding Rich Media
Adotube
Adriver
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
VPAID 1.0
Standard
In-Unit Rich Media
SSL
OOB
Adslot (Facilitate Digital)
Standard
SSL
AdTech (Pictela)
Standard
In-Unit Rich Media
Expanding Rich Media
Standard
In-Unit Rich Media
SSL
OOB
Adverticum
AdXpose
Affinity
Alibaba
Standard
Standard
ASAPCode
Standard
Atlas
Bannerflow
Brainent
Brightroll
Celtra (PV)
Skype In-Unit Rich Media
Skype HP Masthead
Skype Expanding
SSL
OOB
Metrics
SSL
SSL
OOB
SSL
OOB
VAST 2.0
SSL
VPAID 1.0
SSL
SSL
Standard
VPAID 1.0
Standard
SSL
Expanding Rich Media
MRAID 1.0
ComScore
Comune / Reamp
Conversant / Mediaplex
Standard
In-Unit Rich Media
Expanding Rich Media
Standard
In-Unit Rich Media
SSL
Metrics
SSL
VAST 2.0
Crisp
Dimestore
Doubleclick (PV)
Standard
In-Unit Rich Media
Expanding Rich Media
Float
IAB Billboard
IAB Filmstrip
Custom Header
Floor
Billboard Expand
VAST 2.0
VPAID 1.0
Xbox 360*
Xbox One*
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
Standard
MRAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
Standard
Evidon
Extreme Reach
Eyereturn
Flashtalking (PV)
SSL
Metrics
SSL
OOB
*VAST 2.0 only
DoubleVerify
Dynamic Logic - Safecount
Effective One (iEffect)
SSL
OOB
Skype HP Masthead
Skype Expanding
SSL
Metrics
OOB
Metrics
Standard
In-Unit Rich Media
Expanding Rich Media
Float
IAB Billboard
Standard
VAST 2.0
VPAID 1.0
VAST 2.0
VAST 2.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
Standard
SSL
Flite (Widgetbox)
In-Unit Rich Media
Expanding Rich Media
Float
Custom Header
IAB Billboard
IAB Filmstrip
Outlook.com Expanding Rich Media
Skin
Floor
Standard
In-Unit Rich Media
Expanding Rich Media
Float
IAB Billboard
Freewheel
VPAID 1.0
Expanding Rich Media
MRAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
OOB
SafeFrame
SSL
OOB
VAST 2.0
Xbox 360*
Xbox One*
SSL
*VAST 2.0 only
Fringe81
Standard
Fuisz Media
Gemius
Standard
Standard
In-Unit Rich Media
Groovinads
Standard
Innovid
SSL
OOB
VPAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
SSL
VAST 2.0
VPAID 1.0
Xbox 360*
Xbox One*
SSL
*VAST 2.0 only
InsightExpress
Integral Ad Sciences (IAS)
VAST 2.0
VPAID 1.0
Metrics
Metrics
Interpolls
Jivox
LinkStorm
Standard
In-Unit Rich Media
Expanding Rich Media
Standard
In-Unit Rich Media
Expanding Rich Media
Float
Standard
In-Unit Rich Media
Liverail
MarkitOnDemand
VPAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
VAST 2.0
SSL
Standard
HTML5
SSL
OOB
Standard
Expanding Rich Media
MRAID 1.0
Metrixlab
Movad
Standard
In-Unit Rich Media
Expanding Rich Media
Standard
In-Unit Rich Media
Expanding Rich Media
IAB Billboard
Nana10/Hiro
Neustar (Aggregate Knowledge)
Nielsen NetRatings
Pixels Limited
Piximedia
Pointroll (PV)
OOB
SSL
Medialets
Mixpo
SSL
OOB
VPAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
Metrics
SSL
Metrics
SSL
OOB
SSL
OOB
VAST 2.0
Standard
In-Unit Rich Media
Standard
In-Unit Rich Media
Expanding Rich Media
SSL
Metrics
Metrics
Metrics
SSL
VAST 2.0
VPAID 1.0
Standard
Expanding Rich Media
Skype HP Masthead
SSL
SafeFrame
Predicta
RealMedia
Sizmek / Mediamind (PV)
Float
IAB Billboard
Outlook.com Expanding Rich Media
Standard
In-Unit Rich Media
Expanding Rich Media
Standard
In-Unit Rich Media
Standard
In-Unit Rich Media
Expanding Rich Media
Float
IAB Billboard
Custom Header
IAB Filmstrip
Billboard Expand
Flip
Skin
Outlook.com Expanding Rich Media
Skype Expanding
Skype In-Unit Rich Media
VAST 2.0
VAST 2.0
VPAID 1.0
Xbox 360*
Xbox One*
*VAST 2.0 only
SSL
OOB
Skype In-Unit Rich Media
SSL
OOB
Standard
Expanding Rich Media
MRAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
SafeFrame
SmartAdServer
SSL
Smartclip / SalesBooster
Sparkflow
Speedshift
Spongecell
Telemetry
Tremor / Scanscout / Videohub
VAST 2.0
VPAID 1.0
Standard
In-Unit Rich Media
Standard
In-Unit Rich Media
Expanding Rich Media
SSL
Skype Expanding
Skype In-Unit Rich Media
SSL
VAST 2.0
VPAID 1.0
SSL
OOB
VAST 2.0
VPAID 1.0
Xbox 360*
Xbox One*
SSL
*VAST 2.0 only
VAST 2.0
VPAID 1.0
Trueffect
SSL
OOB
Truste
SSL
Metrics
SSL
TubeMogul
VAST 2.0
VPAID 1.0
VAST 2.0
Videology / Tidal TV
Vindico
Weborama/Adrime (PV)
YuMe
Zentrick
SSL
VAST 2.0
VPAID 1.0
Xbox 360*
Xbox One*
Standard
In-Unit Rich Media
Expanding Rich Media
Float
IAB Billboard
Custom Header
IAB Filmstrip
Billboard Expand
Flip
Floor
Skin
Outlook.com Expanding Rich Media
*VAST 2.0 only
VAST 2.0
VPAID 1.0
VAST 2.0
Xbox 360*
Xbox One*
*VAST 2.0 only
VPAID 1.0
SSL
Standard
Expanding Rich Media
MRAID 1.0
Skype HP Masthead
Skype Expanding
Skype In-Unit Rich Media
SSL
OOB
SafeFrame
SSL
SSL
Creative Specs
Microsoft Advertising
http://advertising.microsoft.com/en/creative-specs
IAB (Browse)
http://www.iab.net/guidelines/508676/508767/displayguidelines
IAB (VPAID)
http://www.iab.net/vpaid
IAB (VAST)
http://www.iab.net/vast
IAB (MRAID)
http://www.iab.net/mraid