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Mitel Build and Microsoft Server Update Compatibility List

Use this list to determine which Microsoft Windows Server updates are compatible with the Mitel build you are running. Do not install a Windows Server update unless it has been confirmed compatible with your specific Mitel build version.

ConvergenceIllustration

Do not install Windows updates KB5036896 or KB5036899.

If you have already installed these updates, remove them immediately — they prevent critical services from starting.

If you are unsure which build you are running or need assistance, contact us directly.

Mitel Release Mitel PBX Build Compatible with the latest Microsoft Server updates published on or before the following dates
Release 20.0 22.28.9700.0 8/23/2024
Release 19.3 - SP3 22.24.7100.0 8/16/2023
Release 19.3 - SP2 22.24.1500.0 12/19/2022
Release 19.3 - SP1 22.23.5600.0 9/23/2022
Release 19.3 22.22.6100.0 6/25/2022
Release 19.2 - SP3 22.20.2300.0 12/15/2021
Release 19.2 - SP2 22.20.1300.0 11/08/2021
Release 19.2 - SP1 22.18.4000.0 6/14/2021
Release 19.2 22.13.4800.0 11/2020
Release 19.1 - SP2 22.11.9300.0 4/2020
Release 19.1 - SP1 22.11.4900.0 2/2020
Release 19.1 22.10.7600.0 9/2019
R1807 – Onsite - SP2 21.90.9743.0 7/2019
R1807 – Onsite - SP1 21.90.9738.0 2/2019
R1807 - Onsite 21.90.4127.0 10/2018
R1804 – Onsite - SP1 21.88.3753.0 9/2018
R1804 - Onsite 21.88.3731.0 6/2018
R1803 - Onsite 21.87.9727.0 5/2018
R1801 - Onsite* 21.87.3629.0 2/2018
R1711 - Onsite 21.86.1828.0 1/2018
R1707 - Onsite - SP2 21.84.5543.0 12/2017
R1707 - Onsite - SP1 21.84.5535.0 10/2017
R1707 - Onsite 21.84.5523.0 9/2017
R1704 - Onsite - SP2 21.82.9645.0 8/2017
R1704 - Onsite - SP1 21.82.9630.0 7/2017
R1704 - Onsite 21.82.9623.0 6/2017
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