Network endpoint scanning and traffic analysis to identify operating systems using TLS 1.0/1.1 or older protocols.Application code analysis to find/fix hardcoded instances of TLS 1.0/1.1.They can also download this Office 365 TLS deprecation report to quickly identify the users and devices that connect to Exchange servers via TLS 1.0/1.1.Īt the moment, users of the following clients are advised to update to the latest versions as they are known to be unable to use TLS 1.2: IT administrators can use the official KB4057306 documentation to prepare for TLS 1.2 in Office 365 and Office 365 GCC.
The TLS 1.0/1.1 retirement was first announced in December 2017 and, as explained by Microsoft, the effect of this change for end-users is expected to be minimal. "As previously communicated, 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." "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," the company said in the MC218794 Microsoft 365 admin center announcement on Friday. Microsoft has set the official retirement date for the insecure Transport Layer Security (TLS) 1.0 and 1.1 protocols in Office 365 starting with October 15, 2020, after temporarily halting deprecation enforcement for commercial customers due to COVID-19.
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