DHCP migration.

I am looking for step by step guide to move the windows 2008DHCP to windows 2012.
Any help would be appreciated.
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Seth SimmonsSr. Systems AdministratorCommented:
try this

How to Migrate DHCP from Windows Server 2008 to 2012/2016
sara2000Author Commented:
What would happen to lease IP on the device?
Will they get new IP immediately from new server or they will stay with the old ip until the lease expires?
Seth SimmonsSr. Systems AdministratorCommented:
it should hold the lease until it expires
the client won't know that the dhcp server moved

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Adam LeinssServer SpecialistCommented:
I would assume that at the half-wide point of the lease that the renewal would be denied and it would request a new IP address from the new DHCP server, since the old DHCP server is de-authorized at that point.

Halfway through the lease period, the DHCP client requests a lease renewal, and the DHCP server extends the lease. If a computer stops using its assigned IP address (for example, if a computer is moved to another network segment or is removed), the lease expires and the address becomes available for reassignment.

From: https://technet.microsoft.com/en-us/library/cc958919.aspx
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