We had a weird issues today - scheduled tasks stopped working for a site.
After diggin around I found that it was the "GET /umbraco/ping.aspx " which caused the issue.
Apperently umbraco is pinging the wrong URL.
Does anybody know where umbraco get the “ping URL” from?
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/103865-where-can-i-set-the-umbraco-ping-url