Get FSMO Roles

cmd

netdom query FSMO

PowerShell

Get-ADForest domain.com| ft DomainNamingMaster, SchemaMaster
Get-ADDomain domain.com | ft InfrastructureMaster, PDCEmulator, RIDMaster

Move FSMO Roles

Move-ADDirectoryServerOperationMasterRole -Identity NewDC -OperationMasterRole 0,1,2,3,4

If the current role holder is permanently offline

Move-ADDirectoryServerOperationMasterRole -Identity NewDC -OperationMasterRole 0,1,2,3,4 -Force