How can I migrate maps from one server to a new server?
In Network Atlas you need to firstly open a map (this is on the old server) can click the network atlas logo in the top left > Export Map or press CTRL + E
Export is to a desired location and then connect to that server however you see fit to get the .OrionMap file off
Import that onto the new server and then open network atlas on the new server
Network Atlas logo again or CTRL + O to open and select your .OrionMap file it will then pull that map over.
Be wary though some of the custom icons you had may not come across, if that is the case go to C:\Program Files (x86)\SolarWinds\Orion\Network Atlas\MapsWeb\NetObjects or where ever Orion is installed and pull the files from those folders across, the custom icons will be saved somewhere in that directory obviously its all dependant on who set them up.
Good luck.