First off, a static IP is an absolute must have...
We've been using Azure's default system of what I think is called instance level PIP. One day, the public IP address changed and it took about 4 days for the DNS settings around the world to catch on. Meanwhile, our customers couldn't hit our website through our domain name. That's simply unacceptable.
At the same time, we need to set up a Traffic Manager (load balancer). But, from what I can grasp, it's not possible to set up a Traffic Manager with a reserved IP address in order for the public IP address to remain static. Is this correct?
If it's impossible to get a static IP address for a traffic manager, what are we supposed to do? How can we ensure that a sudden changed public IP address won't take days to update around the globe?