I have shared the solution 14 day ago.
Okay, lets start over. Your original post said.
Append the text below to your constants.conf file on your Windows host and restart the Icinga2 service on your Windows host. This has resolved this error for me on my Windows host.
/* The directory contains the local NSClient++ plugins
* This resolved error - scp.exe, The system cannot find the file specified.
*/
const NscpPath = "C:\\Program Files\\NSClient++"
But this will not work because the constants.conf file you shared is still setup with the default setting. You need to run the Icinga2 installation wizards to complete the setup in Windows.
https://icinga.com/docs/icinga-2/latest/doc/06-distributed-monitoring/#agent-setup-on-windows-configuration-wizard
I’m still having the same problem. I don’t know what it could be.