I would like to share an existing L2TP connection over all users of my PC. But the option "for all users" is disabled. I've enabled an ICS service, but that didn't help. How do I share it?
(Username intentionally left blank.)
For this option to be available the connection needs to be created with the "Allow other people to use this connection" option enabled.
The easiest (only?) way to fix this is to destroy the connection entry and create it again with that option selected.