http://blogs.technet.com/b/sbs/archive/2015/07/23/client-connector-availability-with-windows-home-server-small-business-server-and-windows-server-essentials-for-supported-client-os.aspx

User needs to add the following two lines to the XML file on the server located at –
C:\Program Files\Windows Small Business Server\Bin\WebApp\ClientDeployment\packageFiles\supportedOS.xml

<OS id=”9″ Name=”Windows 10, AMD64″ Major=”10″ Minor=”0″ Build=”10240″ SPMajor=”” SPMinor=”” ExcludedSuite=”512″ RequiredSuite=”” RequiredProductType=”1″ Architecture=”9″/>
<OS id=”10″ Name=”Windows 10, x86″ Major=”10″ Minor=”0″ Build=”10240″ SPMajor=”” SPMinor=”” ExcludedSuite=”512″ RequiredSuite=”” RequiredProductType=”1″ Architecture=”0″/>

<OS id=”11″ Name=”Windows 10, AMD64″ Major=”10″ Minor=”0″ Build=”10586″ SPMajor=”” SPMinor=”” ExcludedSuite=”512″ RequiredSuite=”” RequiredProductType=”1″ Architecture=”9″/>
<OS id=”12″ Name=”Windows 10, x86″ Major=”10″ Minor=”0″ Build=”10586″ SPMajor=”” SPMinor=”” ExcludedSuite=”512″ RequiredSuite=”” RequiredProductType=”1″ Architecture=”0″/>
<OS id=”13″ Name=”Windows 10, AMD64″ Major=”10″ Minor=”0″ Build=”14393″ SPMajor=”” SPMinor=”” ExcludedSuite=”512″ RequiredSuite=”” RequiredProductType=”1″ Architecture=”9″/>
<OS id=”14″ Name=”Windows 10, x86″ Major=”10″ Minor=”0″ Build=”14393″ SPMajor=”” SPMinor=”” ExcludedSuite=”512″ RequiredSuite=”” RequiredProductType=”1″ Architecture=”0″/>