Solution for moving a file share and retain permissions / share settings?

This can easily be done. Robocopy.exe \\source\share \\destination\share /mir /r:1 /w:1 /copyall /e

Shares including all permissions can be exported from registry and imported. https://support.microsoft.com/en-us/help/125996/saving-and-restoring-existing-windows-shares

Instead of pointing to new server, point drive mappings to a DFS Namespace instead. It will make it easier to migrate file server in the future as all drive mappings and shortcuts point to the DFS Namespace, and not directly to an old server name.