Microsoft Entra Connect 2.4.21.0 End of Life Date
Microsoft Entra Connect 2.4.21.0 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
Microsoft Entra Connect 2.4.21.0 was released on October 9, 2024 and support ended on November 15, 2025 — a supported lifespan of 1 year and 1 month, in line with the 1 year and 2 months median for Microsoft Entra Connect releases. It has been without security patches for 11 months. 6 newer Microsoft Entra Connect releases have shipped since.
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →| Version | Latest | EOL Date | Status |
|---|---|---|---|
| Azure AD Connect 1.x | — | Supported | EOL |
| 2.3.2.0 | 2.3.2.0 | Apr 30, 2025 | EOL |
| 2.3.6.0 | 2.3.6.0 | Apr 30, 2025 | EOL |
| 2.3.8.0 | 2.3.8.0 | Apr 30, 2025 | EOL |
| 2.3.20.0 | 2.3.20.0 | Apr 30, 2025 | EOL |
| 2.4.18.0 | 2.4.18.0 | Oct 9, 2025 | EOL |
| → 2.4.21.0 | 2.4.21.0 | Nov 15, 2025 | EOL |
| 2.4.27.0 | 2.4.27.0 | Jan 15, 2026 | EOL |
What does Microsoft Entra Connect 2.4.21.0 end of life mean?
When Microsoft Entra Connect 2.4.21.0 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Microsoft Entra Connect 2.4.21.0 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Microsoft Entra Connect 2.6.92.0 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.