How is it that this is still so unreliable? I get the "unavailable" message like 60% of the time when building in the middle of the night. My CI jobs have to run codesign in a delay retry loop until it succeeds for this reason. I don't have to do this for my windows builds which use another timestamp service. My outbound network is unrestricted and not problematic for anything else. Apple, if you're going to position yourself as the only way to sign apps, you need to actually make your service work reliably!