check before: 2020-10-15
Office 365 general, Microsoft 365 admin center
Online, Web, World tenant
We originally paused the retirement of TLS 1.0 and 1.1 in Office 365 (MC186218 June '20) due to these unprecedented times. As companies have pivoted their supply chains and countries have started to re-open, we have re-established a retirement date for TLS 1.0 and 1.1 in Office 365 to be October 15, 2020. As previously communicated (MC126199 in Dec 2017, MC128929 in Feb 2018 and MC186827 in July 2019), we are moving all of our online services to Transport Layer Security (TLS) 1.2+ toprovide best-in-class encryption, and to ensure our service is more secure by default. Note: If your organization has already taken steps to migrate from TLS 1.0 and 1.1 you can safely disregard this message. Key Points: Major: Retirement Timing: October 15, 2020 Action: update or replace client devices as appropriate
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