ArcGIS Online and TLS 1.2 Notification
As part of improving ArcGIS Online security, Esri will require TLS 1.2 connections for ArcGIS Online services starting on April 16, 2019. Action will be required prior to this change to ensure continued access to ArcGIS Online services from desktop, enterprise, and other applications. For more information, please visit the TLS 1.2 overview page.