@grimsdottir It's not a folder and won't be created, just like /mmn/all isn't a folder and isn't created.

The most common mistake is that someone installs for example nginx, copies some default rewrite rules from somewhere that disallow retrieving "dot-files" (ours should be fixed specifically for that) and then wonder why ".well-known" is inaccessible.

Or that the /index.php prefix is required (because you don't have _any_ rewrite rules) and then no RFC7033 discoveries that look for /.well-known will find their way because they would have to look for /index.php/.well-known .)