Transfer FSMO roles

First you have to find out which DC the roles resides on. On any DC (not read only DC) run the following in powershell Get-ADDomain | Select-Object InfrastructureMaster, RIDMaster, PDCEmulator Als check which server is the Schema Master and the Domain Naming Master by running; Get-ADForest | Select SchemaMaster, DomainNamingMaster | Format-List