This is just crazy, I am starting on PowerShell. And of course I need to do Admin work remotely.
A simple
dir \\\\server\\share\\folder
Powershell also uses Internet Explorer security settings on running remote scripts.
I have found that, for whatever machine you are trying to have run a remote script, if I add the unc path of the remote machine to my trusted intrAnet sites, I can run scripts then (assuming my execution policy in posh is set to remotesigned...."set-executionpolicy remotesigned").
I do a ton of administration for multiple servers with and without SQL, and I've never done anything with Enable-WSManCredSSP.