MKRODC1 ('Start') - Read-Only DC ---- I am trying to do DFR migration, but a dummy RODC will not go to a desired state --- manually delete a RODC ; W2016 DC is the last version of Win server to support DFR

 https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc835490(v=ws.10)?redirectedfrom=MSDN

https://community.spiceworks.com/topic/216177-remove-a-ro-dc-from-our-domain

well easy way is to

dsa.msc

delete

delete

delete

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previously

dfsrmig /getmigrationstate

The following domain controllers have not reached Global state ('Prepared'):

Domain Controller (Local Migration State) - DC Type

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MKRODC1 ('Start') - Read-Only DC

Migration has not yet reached a consistent state on all domain controllers.

State information might be stale due to Active Directory Domain Services latency.

dfsrmig /getmigrationstate

All domain controllers have migrated successfully to the Global state ('Prepared').

Migration has reached a consistent state on all domain controllers.

Succeeded.