check before: 2021-04-21
Online, US Instances, World tenant
Admin impact, Retirement
This message post is a reminder of the ongoing progress of retiring TLS 1.0 and TLS 1.1 protocols in Microsoft 365.As previously communicated (MC126199 in Dec 2017, MC128929 in Feb 2018, MC186827 in July 2019, MC218794 in July 2020 and MC240160 in February 2021), we are moving all our online services to Transport Layer Security (TLS) 1.2+ to provide best in class encryption, and to ensure our services is more secure by default. The changes to enforce TLS1.2+ in our service started on October 15, 2020 and will continue to propagate through all Microsoft 365 environments for the next few months. If you have not taken steps to prepare for this change, your connectivity to Microsoft 365 might be impacted. Yammer recently made a change to a certificate to ensure we support default ciphers. To view which ciphers www.yammer.com supports, please visit https://www.ssllabs.com/ssltest/analyze.html?d=www.yammer.com SSL Report
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