Today in class I hade a student who had a Windows Server 2012 Essentials migration that did nor succeed. The reason was that the FSMO move did not complete.
To list all the FSMO roles using NTDSutil:
1: ntdsutil: roles
2: fsmo maintenance: connections
3: server connections: connect to server [TheNameOfYourDC]
4: server connections: q
5: fsmo maintenance: Select operation target
6: select operation target: List roles for connected server
To seize all the FSMO roles using NTDSutil:
1: fsmo maintenance: Seize domain naming master
2: fsmo maintenance: Seize infrastructure master
3: fsmo maintenance: Seize PDC
4: fsmo maintenance: Seize RID master
5: fsmo maintenance: Seize schema master
If you, like in this case, have a broken DC, remember to delete the object from AD Users and Computers and Sites and Services
/Johan