I'm a little confused by the "Move Server" Menu item. In fact, if I'm correct, we aren't moving servers from one location to another.
We are moving website(s) from 1 server to another.
Same goes for this sentence : "Selecting a new server location for a role will migrate that role for all of the selected websites."
Here's a screenshot to show you exactly: https://postimg.cc/sBJTRLDy
My english isn't good enough to rephrase this last sentence. I hope some fellow community members can help.