Resolved
The login issues facing ESRI products (ArcGIS Online and ArcGIS Pro) has been resolved. All authentication services to ESRI have been restored as of 9:07 PM September 26th.
Initial Alert
We are currently experiencing issues logging into all ESRI online services, to include ArcGIS Pro and ArcGIS Online. ITS engineers are working with our vendors to resolve this as quickly as possible.