When the following URL is not available, what other timestamp URL can I use in my setup authoring tool? The specific error I get is: SignTool Error: The specified timestamp server either could not be reached or returned an invalid response.
Honestly, I would just try again. But you can use any of the following:
http://timestamp.globalsign.com/scripts/timstamp.dll,http://timestamp.comodoca.com/authenticode, orhttp://www.startssl.com/timestamp.http://timestamp.sectigo.com