I am “crash and burn” testing windows 10. Painful but a good way to get the feel of it. One painful loss was the Active Directory module for Powershell. You have to have Remote Server Administration Tools (RSAT) and they stopped working for Win 10. There was a special release for the January version of Win10 but it died with the May version and Microsoft reported they will fix it with the general release.
What to do?
I thought about using one of my test VMs running Windows 2008. It had RSAT but when I tried to import the Active Directory module into Powershell; I received an error saying it did not exist.
I found there were a extra other steps needed to be done:
1) Import-Module ServerManager
2) Add-WindowsFeature RSAT-AD-Powershell
After that, I was able to import the active directory module.
There was a recent update to windows 10 and it nuked RSAT. Microsoft will basically fix it after the OS is released. *sighs*