Moving all accounts and DNS

[Jack-PNH]

Hi,

I'm going to move all accounts from a Cpanel server to another Cpanel server, and just want to be sure I won't cause any downtime. I don't want my customers to change the name servers of their domains.
Would it be ok, if I just copy all acounts with WHM's built in feature and then just change the IP of my name servers at our registrar? I beleive it would work fine, except a few e-mails maybe, that would go to the old server and the owner would check the new server for their e-mails. I would notify our customers about it, and to check both servers for while. What else can be a problem?

Thanks in advance,
Jack

 

[SprintSlash]

When you change the IP of your name servers at the registrar, it might take 3 to 5 days for some ISP to reflect the new update. So you might also want to point all the IPs for accounts on old server to the new server.

 

[Jack-PNH]

Thanks!

Is there a way to mass-change the IPs of all sites? Or do I have to change them manually one by one?