We are studying the possibility of using BitLocker inside the guest OS of VM (i.e. not the parent OS on the VM host). We have both Win2008R2 VM and Win2012(not R2) VM.
And we found this link: https://books.google.com.hk/books?id=Y0TfBgAAQBAJ&pg=PA112&lpg=PA112&dq=Using+Microsoft+BitLocker+In+a+hyper+v+guest&source=bl&ots=gxPNsAlgQn&sig=yvQGkqNkK1q2aOCVnlDZr7ltmTg&hl=zh-TW&sa=X&ved=0ahUKEwjZvL_N8ZzPAhWFl5QKHfJPCyc4FBDoAQhFMAU#v=onepage&q=guest&f=false "BitLocker encryption can be applied to Hyper-V hosts to ensure data protection. The Hyper-V guest encryption is not supported." (the books said in its first few pages that it's based on Win2012R2)
Does that mean BitLocker should not be used inside a Hyper-V guest OS?
But we also found the BitLocker FAQ: https://technet.microsoft.com/en-us/library/hh831507.aspx "Does BitLocker support virtual hard disks (VHDs)? BitLocker is not supported on bootable VHDs, but BitLocker is supported on data volume VHDs, such as those used by clusters, if you are running Windows 8, Windows 8.1, Windows Server 2012 or Windows Server 2012 R2."
It's talking about VHD, which we guess means using BitLocker inside the guest OS?