demote a domain

how to demote a domain controller?
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dc promo from the run command of the domain controller.
Lee W, MVPTechnology and Business Process AdvisorCommented:
Don't forget to manually remove the FSMO roles (move them to another server).
Alan Huseyin KayahanCommented:
           It is not dc promo. It is dcpromo. If the server you are demoting is a secondary domain controller in domain, do not choose "this is the only server left in domain". If it is the PDC and there is no other servers left in domain, choose this option.
          As leew said, if this is the PDC, and there is another GDC already in domain, and if you want this "domain" stay alive and work correctly, you should transfer FSMO roles by using ntdsutil.exe, which is part of server support tools.
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