Been having problems with activesync on this version and it was a fresh installed any how found the problem From IIS manager open default websites then right click on Default Web Site then select propertys then goto ISAPI filters mine was missing OwaLogon if your is missing click add and the input the following information Filter Name OwaLogon Executable Files\Exchsrvr\ExchWeb\bin\auth\OwaAuth.dll Then click ok and then ok and restart IIadmin service
