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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sara2000Asked:
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Seth SimmonsConnect With a Mentor Sr. Systems AdministratorCommented:
it should hold the lease until it expires
the client won't know that the dhcp server moved
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Seth SimmonsSr. Systems AdministratorCommented:
try this

How to Migrate DHCP from Windows Server 2008 to 2012/2016
http://www.brycematheson.io/how-to-migrate-dhcp-from-windows-server-2008-to-2012-2016/
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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?
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Adam LeinssConnect With a Mentor Senior Desktop EngineerCommented:
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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