Mhh ok try this.
Right click or press and hold on an empty area on your desktop, and click/tap on New and Shortcut.
Copy and paste the location below into the location area,
%windir%\explorer.exe shell:Appsfolder\Microsoft.MicrosoftEdge_8wekyb3d8bbwe!MicrosoftEdge
press next
now name it Microsoft Edge for the name, and click on the Finish button.
move the shortcut to a destination where you like it ( if you dont want to have it on your desktop )
Again launch Objectdock as admin.
And drag the shortcut you just created onto it or right click objectdock and add it manually.
If you find this too confusing
here is a tutorial for the shortcut explained step by step
http://www.tenforums.com/tutorials/7755-microsoft-edge-shortcut-create-windows-10-a.html