Microsoft Azure will shift support to TLS 1.2 for Azure Redis Cache and will stop supporting TLS 1.0 and TLS 1.1 effective May 11th. For details see the Microsoft documentation on the issue.
This change may impact Sitecore Managed Cloud customers using Sitecore version 8.x that depend on Azure Redis Cache on .NET 4.6.1 below and also using TLS 1 or TLS 1.1.
The following article outlines how to ensure compatibility with TLS 1.2 for Azure Redis and Sitecore 8.x: https://kb.sitecore.net/articles/067788.
Completed: This activity has completed.
Updated Date: This activity has been set for May 11th instead of March 31st as originally communicated by Microsoft.
Updated: Sitecore official KB article publised to https://kb.sitecore.net/articles/067788.
Identified: Notice posted with proposed solution. Sitecore KB article to follow.