Changing the network type on Win8/Server2012 has change since Win7. Now you have to switch this in local group policy intead. Here is a step-by-step how to change it:

1. Type WinKey+R
2. Type gpedit.msc, hit enter
3. Browse down to Computer Configuration > Windows Settings > Security Setting > Network List Manager Policies
4. Dubbelclick on you desired network
5. Click on tab “Network Location”
6. Under “Location Type” set the value that you want.
7. Close gpedit.msc

Now your all done