Can you clarify what actions need to be taken by individuals using only ArcGIS online users given the switch to TLS 1.2?
Thank you for your question. If you are only using ArcGIS Online, I don't think there is anything you need to do for the update. ArcGIS Online currently supports connections using TLS versions 1.0, 1.1, and 1.2. After April 16, 2019, ArcGIS Online services will only accept connections using TLS 1.2. The actions are for any apps that call to ArcGIS online or connect to it in some way. These docs should help clarify:
Esri Support Important Updates for the ArcGIS Platform and Transport Layer Security (TLS) Protocol Support
FAQ: What do I need to know about TLS 1.2 and the ArcGIS Platform?
Esri Support Esri Software Products Affected by TLS 1.2 Implementation
Let me know if you still have questions and I can pull in an SME to help answer further.
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