files/en-us/web/http/reference/status/423/index.md
The HTTP 423 Locked client error response status code indicates that a resource is locked, meaning it can't be accessed.
Its response body should contain information in {{glossary("WebDAV")}}'s XML format.
[!NOTE] The ability to lock a resource to prevent conflicts is specific to some {{Glossary("WebDAV")}} servers. Browsers accessing web pages will never encounter this status code; in the erroneous cases it happens, they will handle it as a generic {{HTTPStatus(400)}} status code.
423 Locked
HTTP/1.1 423 Locked
Content-Type: application/xml; charset="utf-8"
Content-Length: xxxx
<?xml version="1.0" encoding="utf-8" ?>
<D:error xmlns:D="DAV:">
<D:lock-token-submitted>
<D:href>/workspace/web-dav/</D:href>
</D:lock-token-submitted>
</D:error>
{{Specifications}}