Migrating MS DHCP Server on small network while clients are active

My customer's network has about 20 PCs on it.  I have two servers with the DHCP Server role installed--an old one, which currently handles all DHCP requests, and a new one, which is presently unconfigured.  

Given that this is a small, relatively unchanging network, can I migrate from one server to the other while clients are online and working, provided I do it quickly?  I'd use the following procedure:  export DHCP data from old server, stop DHCP server service on old server, import DHCP data on new server, authorize new server, deauthorize old server.  I can't imagine this would interrupt client connectivity if done quickly, but perhaps I'm wrong?
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Scott CSenior EngineerCommented:
No, you are correct.  The clients will continue to have their DHCP lease for the configured amount of time.  8 days I believe is the default.

By the time they need a new lease, you will have the new DHCP scope configured and up.  

Your users shouldn't notice a thing.

In fact I did just this a couple of weeks ago when bringing up a new 2012 R2 server to replace a 2003 one.

I had to have one of  them do a ipconfig /release /renew as their lease was still good.

You can tell if they are using the new DHCP server by doing an ipconfig /all and seeing which DHCP server they are using.

Or if you want to look like a rock star.....ipconfig /all | find /i "DHCP server"

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AA-in-CAAuthor Commented:
Migrated them to the new server and everything went flawlessly, just as you indicated.  Nobody even noticed a change.  Thanks for your help!
Scott CSenior EngineerCommented:
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