Primary domain controller (PDC) emulator cannot be contacted

Hello, Marcos.

The wording is not very clear to me. How was the migration achieved? You P2V-ed a 2008R2 machine and upgraded the OS (either before or after)? In this case I would expect issues, since you have a DC and its clone running in the same network.

Or, did you promote a new virtual DC to which you transferred the roles?

Assuming both are still existing in the environment and dcdiag.exe (suggested above) didn't give you any relevant hints:

 - Can you check AD replication to make sure it works fine between the physical and virtual DCs? (good old repadmin)?

 - While I wouldn't recommend this officially for production, you could simply wipe the physical DC, delete it in the ADUC on the virtual DC (during this process the FSMO roles will be automatically seized, too).

 - Make sure you promote at least another DC (you need to have at least two writable DCs per each domain in the forest).