Invalid Authentication Information UPS issue label
I am trying to generate a UPS label and I keep getting this error: "Invalid Authentication Information". How can I fix this?
Go into Settings/Compatible Software (edit)/Online Shipping Tools/UPS Developer Kit and choose 'Manage'. On the next page you can delete your registered UPS Shipper Number. You are then able to add it again by selecting 'Register' in that same place. The UPS account and UPS shipping should start working again.
However, before you do this, if your shipping rate tables are already established, be sure to keep a copy of your shipping settings, as they may be affected by this deletion and re-registration. If you are using real time rates for example, you may need to go back to the shipping tables after re-registration of the UPS Kit, and check all the RTR (real time rate) boxes again.