By default, arma server rpts (internal log files) reside inside %AppData%\Local\Arma 3.

If you’re running multiple server instances like me, that’s quite a mess.

Change log directory

First, create a directory logs_server1 inside your Arma3 Server base-directory.

Now you can use the -profiles flag to change the directory:

arma3server.exe -server -port=4102 -profiles=logs_server1