Today, all Dynamics 365 Customer Engagement online versions support TLS 1.0, 1.1 and 1.2, but starting with the release of Dynamics 365 (online) version 9.x and Dynamics 365 (online) Government version 8.2, we will begin blocking connections to the updated product from clients or browsers that are using TLS 1.0 and 1.1. TLS is used in many web browsers and applications that communicate over HTTPS and TCP. TLS stands for Transport Layer Security, and is a protocol that is an industry standard designed to protect the privacy of information communicated over the Internet. Review the following information to help you identify if you are impacted and what steps you may need to take.Īpplies to: Microsoft Dynamics 365 Original KB number: 4051700 What is TLS? This aligns with updated Microsoft and industry security policies and best practices, and you may be required to take actions to maintain connectivity to Dynamics 365 Customer Engagement applications. In Dynamics 365 (online) version 9.x and Dynamics 365 (online) Government version 8.2, we will begin requiring connections to customer engagement applications to utilize TLS 1.2 (or better) security.

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