Space Engineers whitelisting is handled with a Steam group. When a Steam Group ID is set, only members of that Steam group should be able to join the server.
Enable Steam Group Whitelist
- Create or choose the Steam group you want to use for the whitelist.
- Invite every allowed player to that Steam group.
- Find the group ID: How to find a Steam Group ID.
- Open your Space Engineers server in the control panel.
- Click Configuration Files.
- Open
worlds\SpaceEngineers-Dedicated.cfgwith Config Editor.
- Set Whitelist Steam GroupID to the Steam group ID.

- Click Save & Exit, then restart the server.
To disable the whitelist, set Whitelist Steam GroupID back to 0 and restart the server.
Check the player identifier
Use the exact identifier the game expects, such as a username, SteamID64, UUID, or player ID. Copy it carefully, because one wrong digit or character can apply the change to the wrong player or stop it working.
After making the change
Restart the server if the game requires it, then test with the affected player. If the change does not apply, check the console or log output for permission or formatting errors.