Microsoft will delay disabling support for the insecure Transport Layer Security (TLS) 1.0 and 1.1 protocols from Microsoft web browsers until the second half of 2020. The retirement of these insecure protocols was announced by all major browser makers including Microsoft, Google, Apple, and Mozilla back in October 2018. Microsoft recommends transitioning from insecure protocols as newer versions come with more modern cryptography and are also broadly supported by modern browsers. Users will still be able to toggle the insecure protocols back on even after they will be disabled.
Source: https://www.bleepingcomputer.com/news/security/microsoft-delays-disabling-insecure-tls-in-browsers-until-july/