REMINDER: Office 365 will retire TLS 1.0 and 1.1 starting June 1st 2020 in worldwide and GCC environments

MC186218, Plan For Change, Originally Published date: Jul 19, 2019

FROM MICROSOFT CORPORATION

Action required by May 31, 2020

Major Update: General Availability startedApplies To: All customers

As previously communicated (MC124104 in Oct 2017, MC126199 in Dec 2017 and MC128929 in Feb 2018), we are moving all of our online services to Transport Layer Security (TLS) 1.2+ to provide best-in-class encryption, and to ensure our service is more secure by default.

Keeping on track with this promise – Office 365 will be retiring TLS 1.0 and 1.1 starting June 1, 2020.How does this impact me?

Starting June 1, 2020, Office 365 will begin retiring TLS 1.0 and 1.1. This means that all connections to Office 365 using the protocols TLS 1.0 and TLS 1.1 will not work.What should I do to prepare for this change?

Update or replace clients and devices that rely on TLS 1.0 and 1.1 to connect to Office 365, prior to June 1, 2020.

Please click Additional Information to learn more.Additional information

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