Office LTSC 2021 reaches End of Support on 13 October 2026.

After this date Microsoft will no longer provide updates, security fixes, or technical support. The recommended route is (unsurprisingly) Microsoft 365 or the perpetual option of Office LTSC 2024, which is supported until October 2029.

Find the latest reminder article here: https://bit.ly/4iBRrdQ, which includes useful information for customers about preparation and transitioning.