This incident has been resolved.
Sep 14, 09:01 CDT
UPS has confirmed that a fix has been deployed to resolve this issue. We have seen a reduction in error rates and are continuing to monitor.
Sep 13, 13:13 CDT
The issue has been identified and a fix is being implemented.
Sep 13, 12:04 CDT
We are investigating widespread reports of intermittent authentication errors being returned when attempting to create or void UPS labels or register new UPS accounts.
This issue looks to be specific to UPS and is not similarly impacting other carriers at this time.
Sep 13, 10:37 CDT