Effective April 16, 2019, Esri will update ArcGIS Online by the enforcement of the use of TLS (Transport Layer Security) version 1.2. This enforcement is part of Esri’s commitment of providing strong security for the ArcGIS platform by using the latest industry standards and best practices for security protocols.

What is the impact of this security update?

This security update is likely to affect most ArcGIS software and customer solutions. If you have not updated and validated your system's support for TLS v1.2 only, you may lose your ability to connect to ArcGIS Online.

What do you have to do?

Go to the Esri TLS Support page for information, patches, and instructions for updating your software for TLS v1.2. Patches for all versions of ArcGIS Desktop back to 10.2.1 are now available.

How will you know that your ArcGIS will work when TLS v1.2 is enforced?

Esri is providing a validation web service that can be used to quickly verify that your ArcGIS Desktop will work when TLS v1.2 only is enforced. Esri is also providing validation services for customers utilizing third-party apps and custom components including map services, geocoding services, and basemap services. Information about these validation services is available on Esri TLS Support page.