It is framework for developing mobile application which communicate with NAV. You need to ask Microsoft for prerequisites which you needs to be able to use this framework. And I am sure that you will find some webcasts about this (it is same for AX, NAV and others, just with different connector for each system):
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http://www.mibuso.com/dlinfo.asp?FileID=911
http://www.mibuso.com/dlinfo.asp?FileID=927
http://www.mibuso.com/dlinfo.asp?FileID=1028
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If you have access to partnersource then you can start from reading documentations and presentations from https://mbs.microsoft.com/partnersource ... ons/mobile
and you can read:
http://www.dynamicsmobile.net/
http://blogs.msdn.com/dynamicsmobile/default.aspx