I am working in a business that is planning to switch ISPs really soon. We will need to change a lot of information in our DNS, WAN and Wan-WiFi.
I have some questions for you guys that can help me, and maybe, other people, to plan correctly the change from our current ISP to a new one.
First of all, DNS...
What should I know, when we will receive the new IPs from the ISP? What are the major changes that I need to take in consideration?
We have an Exchange server (OWA), VPN, two sites linked with a Wireless connection (10km away) Citrix servers, VMWare, Exchange, Domain Controller (That are linked from each place) and other important servers.
What are the crucial steps or information that I need to know to avoid any downtime here?
The business is 24/7.