1) Add machine2 as an administrator to machine1

2) Create a batch file with the following 3 lines:

C:\Windows\System32\netsh.exe -r machine1 nps export filename=”c:\npsexport.xml” exportPSK=”YES”
c:\windows\system32\netsh.exe nps import filename=”c:\npsexport.xml”
del /F /Q c:\npsexport.xml

3) Create a scheduled task

Done.