Changing the RCON settings is a bit more complicated with DayZ, but you can definitely do it by following the instructions below.
- Shut down the server
- Open the "File Manager" menu
- In the "battleye" folder you will find the file "BEServer_x64_active_XXXXX.cfg", delete this file
- In the main menu click on "Configuration files"
- For the file "BEServer_x64.cfg" click on "Text Editor"
- In the text editor, then enter the following
- RConPassword 1234 (choose a password)
- Rconport XXXX (leave this out)
- RestrictRCon 0 (1 for off and 0 for on)
- So the result looks like the image below
- Turn on the server

This action must be repeated for each change, DayZ will always create an Active file that needs to be deleted to overwrite the new settings
