How to move from an old DHCP server to a new one?

Question

DHCP

Hello.
There is a domain controller on Windows Server 2008R2. It has the basic DHCP, DNS, and ActiveDirectory roles installed.
But there are already not enough DHCP addresses (192.168.90.0/24). We want to move to a new DHCP range (192.168.76.0/22), since we won’t be able to expand the 90th subnet further (they are occupied by other branches).
Tell me how to correctly and competently move from one subnet to another and let computers know about it?
I would be grateful for the official mana.

Answer 1

What about Superscope? If this does not solve your problem, then https://technet.microsoft.com/en-us/library/cc7765...

Answer 2

Why move to a new DHCP server when changing subnets? Or do you only need to move to a new subnet? Here you need to understand what ranges you have not occupied. Indeed, you can draw a superscope, but in reverse, you need to understand what ranges you have occupied from 192.168.0.0/16