[ovirt-users] Windows VDI Licensing

Hello, I currently work on a Windows VDI infrastructure based on ovirt, i'm looking for informations or experiences about Windows/Office VDI Licensing. My pool is stateless and the domain controller is a Samba 4.5. I called Microsoft for informations they told me i need a Windows Server Active Directory because it's impossible to activate the Windows with a Samba 4 AD. Can someone confirm ? If it's possible with a Samba AD, what license do i need for Windows and for Office ? I don't know which one is better, SA / VDA / RDS CAL / ... Thank you.