Note
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The Microsoft Trusted Root Certificate Program releases changes to our Root Store on a monthly cadence, except for December. The public can expect the following cadence for releases:
- Additions and non-deprecating modifications will be completed any month
- Certificate Authority (CA)-initiated and CA-confirmed deprecations occur on even numbered months
- Microsoft-initiated deprecations occur in February and August releases
If you are a certificate user who has active certificates chained up to a deprecating root, please reach out to your CA to understand how changes may impact your certificates. Update packages will be available for download and testing at https://aka.ms/CTLDownload
Note that the changes listed are accurate at the time of posting but are subject to change.
A list of Root Store participants, updated monthly, can be found here: https://aka.ms/trustcertpartners.
2025
| Month | Date of Release | Release Notes |
|---|---|---|
| February | February 25 | Deployment Notice for February 2025 |
| May | May 28 | Deployment Notice for May 2025 |
2024
| Month | Date of Release | Release Notes |
|---|---|---|
| December | December 24 | Testing Notice for December 2024 |
| December | December 4 | Deployment Notice for December 2024 |
| May | May 28 | Deployment Notice for May 2024 |
| March | March 26 | Deployment Notice for March 2024 |
| February | February 27 | Deployment Notice for February 2024 |
2023
| Month | Date of Release | Release Notes |
|---|---|---|
| November | November 28 | Deployment Notice for November 2023 |
| March | March 28 | Deployment Notice for March 2023 |
| February | February 28 | Deployment Notice for February 2023 |
2022
| Month | Date of Release | Release Notes |
|---|---|---|
| November | November 29 | Deployment Notice for November 2022 |
| October | October 25 | Deployment Notice for October 2022 |
| September | September 27 | Deployment Notice for September 2022 |
| August | August 23 | Deployment Notice for August 2022 |
| June | June 28 | Deployment Notice for June 2022 |
| May | May 17 | Deployment Notice for May 2022 |
| April | April 26 | Deployment Notice for April 2022 |
| February | February 22 | Deployment Notice for February 2022 |
2021
| Month | Date of Release | Release Notes |
|---|---|---|
| October | October 26 | Deployment Notice for October 2021 |
| September | September 28 | Deployment Notice for September 2021 |
| August | August 24 | Deployment Notice for August 2021 |
| June | June 22 | Deployment Notice for June 2021 |
| May | May 25 | Deployment Notice for May 2021 |
| April | April 29 | Deployment Notice for April 2021 |
| February | March 3 | Deployment Notice for February 2021 |
| January | January 26 | Deployment Notice for January 2021 |
2020
| Month | Date of Release | Release Notes |
|---|---|---|
| October | October 27 | Deployment Notice Posted October 27 |
| September | September 29 | Deployment Notice Posted September 29 |
| September | September 3 | Deployment Notice Posted September 3 |
| August | August 25 | Deployment Notice Posted August 18 |
| July | July 28 | Deployment Notice Posted July 27 |
| June | June 30 | Deployment Notice Posted June 9 |
| May | May 19 | Deployment Notice Posted May 19 |
| April | April 28 | Deployment Notice Posted April 21 |
| April | Notice Posted April 1 | |
| March | March 24 | Deployment Notice Posted March 18 |
| February | February 25 | Deployment Notice Posted February 3 |
| January | January 28 | Deployment Notice Posted January 22 |
2019
| Month | Date of Release | Release Notes |
|---|---|---|
| October | November 5 | Deployment Notice Posted October 11 |
| August | August 14 | Deployment Notice Posted August 14 |
| August | August 27 | Deployment Notice Posted August 2 |
| July | July 10 | Deployment Notice Posted July 11 |
| July | July 30 | Deployment Notice Posted July 2 |
| June | July 2 | Deployment Notice Posted June 5 |
| May | May 28 | Deployment Notice Posted May 1 |
| April | April 30 | Deployment Notice Posted April 15 |
| March | March 26 | Deployment Notice Posted March 6 |
| February | March 5 | Deployment Notice Posted February 19 |
| January | January 29 | Deployment Notice Posted January 23 |