Hi @RumorConsumer ,
Might be the swiftest way of getting her back online. As you say, whilst it’s still registered on the old cct, change the static WAN IP, wait for the setting to apply (it won’t of course come back online just yet), swap the cct over, MX jumps into life.
Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/
I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.