Office 365 security: 3DES cipher comes to it’s end on February 28, 2019

As part of Microsoft’s plan to move all online services to TLS 1.2, they are retiring 3DES beginning February 28, 2019. As a result, connections using the ciper 3DES will not work.

You can get an overview of your TLS 1.0/1.1 and 3DES usage in Office 365’s Secure Score at http://securescore.microsoft.com

Remember that TLS 1.0 and TLS 1.1 are not supported since October 31, 2018. Fore more details see:

https://ranariblog.wordpress.com/2018/10/16/microsoft-office-365-will-remove-support-for-tls-1-0-and-1-1-starting-october-31-2018/

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