Can I map a drive to a redirected My Documents folder/Home Drive?

I have folder redirection set up to:  \\servername\Users$\testuser (Folder redirection automatically create a documents folder)

I would like to map to that same folder using group policy preferences.  What I have set to map is \\servername\users$\%UserLogon%

Is that correct/Is this even possible?  I can to it with a script if need be.

Thanks