Microsoft Set to Disable Outdated TLS 1.0 and 1.1 Protocols in Upcoming Windows Releases

Microsoft has officially stated that it will soon disable the TLS 1.0 and 1.1 protocols by default in future releases of the Windows operating system. These decisions align with the company’s initiative to ensure the safety and security of data exchanges over the Internet.

The Role of TLS Protocols

Think of Transport Layer Security (TLS) as the bouncer for the internet’s VIP club. Its role is vital to ensure a private conversation between two parties—the client and the server—knitted together in a secure, encrypted line of communication. This tight-lipped system shields users from sneak peeks, meddling, and fake messaging threats. Now, cast your mind back nearly 20 years, when TLS 1.0 made its debut in ’99 with its younger sibling, 1.1 showing up seven years later in ’06. Time didn’t stand still for these versions though; they’ve been regularly spruced up with advancements over the years. The arrival of the beefed-up TLS 1.2 came about in ’08, followed by the latest and greatest edition yet, TLS 1.3 which got the nod of approval from the bigwigs at the Internet Engineering Task Force (IETF) just a couple of years back in 2018. Find out more about the IETF and its decisions here.

Details of the Upcoming Changes

  • The new policy applies only to future Windows operating systems, encompassing both client and server editions. – Existing Windows versions will remain unaffected.
  • Beginning September 2023, Windows 11 Insider Preview builds will have TLS 1.0 and 1.1 disabled by default.
  • Users who need these outdated protocols for compatibility reasons will have the option to manually re-enable them.

Implications for Users and Enterprises

  • Home users of Windows will likely face minimal disruptions due to this transition.
  • Enterprises, especially their administrators, may encounter challenges. Microsoft has published a list of applications anticipated to experience compatibility issues. Notably, SQL Server versions like 2014 and 2016, and Apple’s Safari browser version 5.1.7 for Windows are included.
  • Microsoft strongly recommends enterprise administrators test their environments to pinpoint and update or replace affected applications.
  • Any application issues arising from the disabled TLS versions will be highlighted via Event 36871 in the Windows Event Log.
  • Although the option to revert to the older TLS versions via Windows Registry exists, it should be viewed as a temporary solution.

A Move Towards Enhanced Security

Microsoft’s move aligns with a collective effort by major tech giants, including Apple, Google, and Mozilla, to phase out insecure TLS protocols. In October 2018, these companies jointly announced their intentions, with Microsoft enabling TLS 1.3 by default in Windows 10 Insider builds by August 2020.

The National Security Agency (NSA) highlighted the vulnerabilities of obsolete TLS configurations. They stated, “Obsolete configurations provide adversaries access to sensitive operational traffic using techniques like passive decryption and traffic modification through man-in-the-middle attacks.”

Historical Delays and the Path Forward

While Microsoft’s decision to disable TLS 1.0 and 1.1 is a step towards enhanced cybersecurity, it’s essential to note that the company’s journey in achieving this has experienced several setbacks. Initially, Microsoft had plans to disable these protocols by default in browsers like Edge and Internet Explorer 11 in the first half of 2020. However, due to unforeseen challenges and the necessity to maintain backward compatibility for some applications, these plans were pushed back to 2021. The company later set September 20, 2022, as the deadline for Internet Explorer and EdgeHTML. In its flagship browser, Chromium Edge, the protocols were disabled by default from version 84.


As technology continues to evolve, the need for robust and secure communication channels becomes paramount. By disabling outdated TLS versions, Microsoft is emphasizing its commitment to user security, urging enterprises to adapt and update to ensure consistent, safe experiences. The industry’s collective transition away from deprecated TLS versions underscores the significance of this security-focused move and paves the way for more resilient and protected online interactions in the future.

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