If we look at the client side of Workplace Join process it says that we should log on with Microsoft account, but I've never seen it mentioned that Microsoft account is a requirement for Workplace Join. Recently I performed server side setup for Workplace Join on my test server using the following steps:
Unfortunately I was not able to perform Windows 8.1 VM join following those steps:
Could it be because of using local instead of Microsoft account? Am I missing something else here? Network connectivity between VMs is checked.