← cd ~/deadlines
// deadlines · Microsoft 365
Office LTSC 2021 reaches end of supportMicrosoft 365 · 13 Oct 2026
Office LTSC 2021 (Standard and Standard for Mac) stops receiving security updates. Move users to Microsoft 365 Apps or Office LTSC 2024.
In short: this took effect on 13 Oct 2026. This date has passed.
What to do
- Read the official notice: Microsoft source ↗.
- Add every Microsoft deadline to your calendar: subscribe to the deadlines calendar.
Other upcoming Microsoft 365 deadlines
- 10 Oct 2028 Microsoft 365 Apps security updates on Windows 10 end
- 9 Oct 2029 Office LTSC 2024 and Office 2024 reach end of support
Sources