I had the same error message. I installed the GUI tool from the system- config-samba package. There under settings->server-settings->security you can choose the user for the guest account. It said no guest account. I changed it to nobody and restarted smbd. After this I didn't get the error any longer and sharing from nautilus worked like expected.
Hope this helps somebody else. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to samba in ubuntu. https://bugs.launchpad.net/bugs/513427 Title: 'net usershare' returned error 255: net usershare add: cannot convert name "Everyone" to a SID. Invalid parameter. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
