Exchange 2010 to Exchange 2013 work order

Hi ,

Can anyone help me on below points.

I have installed exchange 2013 , and able to view all mail box form existing server 2010.

And move successfully some mail box from 2010 to 2013.

My question are :

Pls let me know the sequence for below reimaging task……

1.       Move all mailbox from 2010 to 2013
2.       Change connectors (received /Send)
3.       NAT the IP in Router (private to Public)
4.       Change the IP address in service provide site. ( OWA for external users)
5.       Need to create or change MX record in internal DNS as well ?
6. How to change MX record for external DNS.

Note: 2010 is exchange 2010 & 2013 is exchange 2013.

Regards,

Dilip T