Microsoft has issued a formal reminder to global IT administrators regarding the upcoming end-of-life for the Internet Explorer mode in the Microsoft Edge browser. The company has set the final support deadline for 2029, urging organizations to accelerate the modernization of legacy web assets and business systems.
The IE mode was introduced in 2022 following the retirement of the standalone Internet Explorer 11 desktop client. It was designed to maintain compatibility with legacy systems relying on the Trident engine and ActiveX controls. Microsoft committed to supporting this feature until 2029 to provide a transition period for software reconstruction.
The company warns that organizations should not underestimate the time required for full migration. Many internal systems, including office automation tools and industrial control interfaces, require extensive code rewrites and security testing to move away from proprietary IE features. Delaying these projects until the deadline poses significant operational risks.
IT architects are advised to use the Enterprise Site List Manager to audit all applications currently dependent on IE mode. Microsoft recommends creating a phased roadmap to migrate high-frequency services to modern web standards such as HTML5, CSS3, and modern JavaScript, effectively reducing the reliance on legacy rendering engines.
