Windows Server Os is a cornerstone for businesses of all sizes, providing the robust and reliable infrastructure needed for modern IT operations. To ensure users can leverage the latest features and maintain optimal security, Microsoft offers two primary release channels for Windows Server OS: the Long-Term Servicing Channel (LTSC) and the Annual Channel (AC). Understanding these channels is crucial for choosing the right Windows Server OS for your specific needs.
Windows Server Servicing Channels: LTSC vs. AC
Microsoft provides two distinct servicing channels for its Windows Server OS: the Long-Term Servicing Channel (LTSC) and the Annual Channel (AC). These channels cater to different needs and priorities within the IT landscape.
Long-Term Servicing Channel (LTSC)
The Long-Term Servicing Channel (LTSC) is designed for organizations that prioritize stability and a predictable update cycle for their Windows Server OS. LTSC releases are major versions that come out every 2-3 years.
Key characteristics of LTSC:
- Longer Support Lifecycle: LTSC releases come with 5 years of mainstream support and 5 years of extended support, totaling a decade of security and quality updates. This extended lifecycle reduces the frequency of major upgrades, minimizing disruption.
- Focus on Stability: LTSC is built for workloads that require maximum stability and reliability. It includes proven technologies and features that have undergone extensive testing.
- Traditional Release Cadence: LTSC follows a traditional release model, making it easier for organizations to plan and manage their Windows Server OS deployments over the long term.
- Editions: Typically available in Datacenter and Standard editions, catering to a wide range of server infrastructure needs.
- Use Cases: Ideal for infrastructure workloads, traditional data centers, and scenarios where feature updates are less critical than long-term stability and support.
Annual Channel (AC)
The Annual Channel (AC), formerly known as the Semi-Annual Channel, is designed for customers who want to take advantage of faster innovation with their Windows Server OS. AC releases bring new features and functionalities more frequently, typically twice a year.
Key characteristics of AC:
- Rapid Innovation: AC releases focus on delivering new features, particularly those related to containers, microservices, and application development, allowing organizations to adopt cutting-edge technologies quickly.
- Faster Release Cycle: New versions are released more frequently, enabling faster access to the latest Windows Server OS capabilities.
- Shorter Support Lifecycle: Each AC release is supported for 18 months. This requires organizations to be prepared for more frequent upgrades to stay within the supported lifecycle.
- Focus on Containers and Microservices: AC is optimized for modern application development and deployment, with a strong emphasis on containerization and microservices architectures.
- Editions: Primarily focused on Datacenter edition, reflecting its target audience of organizations embracing cloud-native technologies.
- Use Cases: Best suited for organizations with agile development practices, those heavily invested in containers and microservices, and those who want to continuously leverage the newest features of Windows Server OS.
Currently, Windows Server 2025 is the latest LTSC release, offering a long-term, stable platform. Windows Server, version 23H2 represents the most recent Annual Channel release, packed with the latest innovations. Microsoft continues to drive innovation in virtualization, containers, and microservices through Azure Stack HCI, Windows containers, and AKS on Azure Stack HCI, all tightly integrated with the Windows Server OS ecosystem.
Windows Server Major Versions and Lifecycle
Understanding the different versions of Windows Server OS and their respective lifecycles is essential for IT planning and management. The following table outlines key information for major Windows Server versions by servicing option:
| Windows Server version | Servicing option | Editions | Availability date | Latest build | Mainstream support end date | Extended support end date |
|---|---|---|---|---|---|---|
| Windows Server 2025 | Long-Term Servicing Channel (LTSC) | Datacenter, Standard | 2024-11-01 | 26100.3194 | 2029-10-09 | 2034-10-10 |
| Windows Server 2022 | Long-Term Servicing Channel (LTSC) | Datacenter, Standard | 2021-08-18 | 20348.3207 | 2026-10-13 | 2031-10-14 |
| Windows Server 2019 (version 1809) | Long-Term Servicing Channel (LTSC) | Datacenter, Standard | 2018-11-13 | 17763.6893 | End of servicing | 2029-01-09 |
| Windows Server 2016 (version 1607) | Long-Term Servicing Branch (LTSB) | Datacenter, Essentials, Standard | 2016-08-02 | 14393.7785 | End of servicing | 2027-01-12 |
It’s important to note that Windows Server OS operates under the Fixed Lifecycle Policy. For detailed information on servicing requirements and the lifecycle policy, refer to the Windows Lifecycle FAQ and the Comparison of servicing channels. Further details about the Windows Server Lifecycle Policy can be found on the Windows Server Releases page.
Windows Server Release History and Update Details
Keeping your Windows Server OS up to date is crucial for security and performance. Microsoft provides monthly security and non-security preview updates for supported LTSC versions of Windows Server.
The following tables detail the update history for various Windows Server OS versions, showing the monthly updates released for the Long-Term Servicing Channel. The “Update type” column uses a shorthand notation (e.g., 2025-02 B) indicating the year and month of release, followed by a letter for the week of the month (B is the second week, D is the fourth week). Out-of-band updates are marked as OOB. This notation aligns with what you might see in Microsoft Intune. For more information on update types, see Type of update releases.
For comprehensive release notes, you can visit the update history pages for each Windows Server OS version: Windows Server 2025 update history, Windows Server 2022 update history, Windows Server 2019 update history, and Windows Server 2016 update history.
Windows Server 2025 (OS build 26100)
| Servicing option | Update type | Availability date | Build | KB article |
|---|---|---|---|---|
| LTSC | 2025-02 B | 2025-02-11 | 26100.3194 | KB5051987 |
| LTSC | 2025-01 B | 2025-01-14 | 26100.2894 | KB5050009 |
| LTSC | 2024-12 B | 2024-12-10 | 26100.2605 | KB5048667 |
| LTSC | 2024-11 B | 2024-11-12 | 26100.2314 | KB5046617 |
| LTSC | 2024-10 A | 2024-11-01 | 26100.1742 |
Windows Server 2022 (OS build 20348)
| Servicing option | Update type | Availability date | Build | KB article |
|---|---|---|---|---|
| LTSC | 2025-02 B | 2025-02-11 | 20348.3207 | KB5051979 |
| LTSC | 2025-01 OOB | 2025-01-18 | 20348.3095 | KB5052819 |
| LTSC | 2025-01 B | 2025-01-14 | 20348.3091 | KB5049983 |
| LTSC | 2024-12 B | 2024-12-10 | 20348.2966 | KB5048654 |
| LTSC | 2024-11 B | 2024-11-12 | 20348.2849 | KB5046616 |
| LTSC | 2024-10 B | 2024-10-08 | 20348.2762 | KB5044281 |
| LTSC | 2024-09 B | 2024-09-10 | 20348.2700 | KB5042881 |
| LTSC | 2024-08 B | 2024-08-13 | 20348.2655 | KB5041160 |
| LTSC | 2024-07 B | 2024-07-09 | 20348.2582 | KB5040437 |
| LTSC | 2024-06 OOB | 2024-06-20 | 20348.2529 | KB5041054 |
| LTSC | 2024-06 B | 2024-06-11 | 20348.2527 | KB5039227 |
| LTSC | 2024-05 B | 2024-05-14 | 20348.2461 | KB5037782 |
| LTSC | 2024-04 B | 2024-04-09 | 20348.2402 | KB5036909 |
| LTSC | 2024-03 OOB | 2024-03-22 | 20348.2342 | KB5037422 |
| LTSC | 2024-03 B | 2024-03-12 | 20348.2340 | KB5035857 |
| LTSC | 2024-02 B | 2024-02-13 | 20348.2322 | KB5034770 |
| LTSC | 2024-01 B | 2024-01-09 | 20348.2227 | KB5034129 |
| LTSC | 2023-12 B | 2023-12-12 | 20348.2159 | KB5033118 |
| LTSC | 2023-11 B | 2023-11-14 | 20348.2113 | KB5032198 |
| LTSC | 2023-10 B | 2023-10-10 | 20348.2031 | KB5031364 |
| LTSC | 2023-09 B | 2023-09-12 | 20348.1970 | KB5030216 |
| LTSC | 2023-08 B | 2023-08-08 | 20348.1906 | KB5029250 |
| LTSC | 2023-07 B | 2023-07-11 | 20348.1850 | KB5028171 |
| LTSC | 2023-06 B | 2023-06-13 | 20348.1787 | KB5027225 |
| LTSC | 2023-05 B | 2023-05-09 | 20348.1726 | KB5026370 |
| LTSC | 2023-04 B | 2023-04-11 | 20348.1668 | KB5025230 |
| LTSC | 2023-03 B | 2023-03-14 | 20348.1607 | KB5023705 |
| LTSC | 2023-02 B | 2023-02-14 | 20348.1547 | KB5022842 |
| LTSC | 2023-01 B | 2023-01-10 | 20348.1487 | KB5022291 |
| LTSC | 2022-12 OOB | 2022-12-20 | 20348.1368 | KB5022553 |
| LTSC | 2022-12 B | 2022-12-13 | 20348.1366 | KB5021249 |
| LTSC | 2022-11 C | 2022-11-22 | 20348.1311 | KB5020032 |
| LTSC | 2022-11 OOB | 2022-11-17 | 20348.1251 | KB5021656 |
| LTSC | 2022-11 B | 2022-11-08 | 20348.1249 | KB5019081 |
| LTSC | 2022-10 C | 2022-10-25 | 20348.1194 | KB5018485 |
| LTSC | 2022-10 OOB | 2022-10-17 | 20348.1131 | KB5020436 |
| LTSC | 2022-10 B | 2022-10-11 | 20348.1129 | KB5018421 |
| LTSC | 2022-09 C | 2022-09-20 | 20348.1070 | KB5017381 |
| LTSC | 2022-09 B | 2022-09-13 | 20348.1006 | KB5017316 |
| LTSC | 2022-08 C | 2022-08-16 | 20348.946 | KB5016693 |
| LTSC | 2022-08 B | 2022-08-09 | 20348.887 | KB5016627 |
| LTSC | 2022-07 C | 2022-07-19 | 20348.859 | KB5015879 |
| LTSC | 2022-07 B | 2022-07-12 | 20348.825 | KB5015827 |
| LTSC | 2022-06 C | 2022-06-23 | 20348.803 | KB5014665 |
| LTSC | 2022-06 B | 2022-06-14 | 20348.768 | KB5014678 |
| LTSC | 2022-05 C | 2022-05-24 | 20348.740 | KB5014021 |
| LTSC | 2022-05 OOB | 2022-05-19 | 20348.709 | KB5015013 |
| LTSC | 2022-05 B | 2022-05-10 | 20348.707 | KB5013944 |
| LTSC | 2022-04 C | 2022-04-25 | 20348.681 | KB5012637 |
| LTSC | 2022-04 B | 2022-04-12 | 20348.643 | KB5012604 |
| LTSC | 2022-03 C | 2022-03-22 | 20348.617 | KB5011558 |
| LTSC | 2022-03 B | 2022-03-08 | 20348.587 | KB5011497 |
| LTSC | 2022-02 C | 2022-02-15 | 20348.558 | KB5010421 |
| LTSC | 2022-02 B | 2022-02-08 | 20348.524 | KB5010354 |
| LTSC | 2022-01 C | 2022-01-25 | 20348.502 | KB5009608 |
| LTSC | 2022-01 OOB | 2022-01-17 | 20348.473 | KB5010796 |
| LTSC | 2022-01 B | 2022-01-11 | 20348.469 | KB5009555 |
| LTSC | 2022-01 OOB | 2022-01-05 | 20348.407 | KB5010197 |
| LTSC | 2021-12 B | 2021-12-14 | 20348.405 | KB5008223 |
| LTSC | 2021-11 C | 2021-11-22 | 20348.380 | KB5007254 |
| LTSC | 2021-11 B | 2021-11-09 | 20348.350 | KB5007205 |
| LTSC | 2021-10 C | 2021-10-26 | 20348.320 | KB5006745 |
| LTSC | 2021-10 B | 2021-10-12 | 20348.288 | KB5006699 |
| LTSC | 2021-09 C | 2021-09-27 | 20348.261 | KB5005619 |
| LTSC | 2021-09 B | 2021-09-14 | 20348.230 | KB5005575 |
| LTSC | 2021-08 C | 2021-08-26 | 20348.202 | KB5005104 |
Windows Server 2019 (OS build 17763)
| Servicing option | Update type | Availability date | Build | KB article |
|---|---|---|---|---|
| LTSC | 2025-02 B | 2025-02-11 | 17763.6893 | KB5052000 |
| LTSC | 2025-01 B | 2025-01-14 | 17763.6775 | KB5050008 |
| LTSC | 2024-12 B | 2024-12-10 | 17763.6659 | KB5048661 |
| LTSC | 2024-11 B | 2024-11-12 | 17763.6532 | KB5046615 |
| LTSC | 2024-10 B | 2024-10-08 | 17763.6414 | KB5044277 |
| LTSC | 2024-09 B | 2024-09-10 | 17763.6293 | KB5043050 |
| LTSC | 2024-08 B | 2024-08-13 | 17763.6189 | KB5041578 |
| LTSC | 2024-07 B | 2024-07-09 | 17763.6054 | KB5040430 |
| LTSC | 2024-06 B | 2024-06-11 | 17763.5936 | KB5039217 |
| LTSC | 2024-05 OOB | 2024-05-23 | 17763.5830 | KB5039705 |
| LTSC | 2024-05 B | 2024-05-14 | 17763.5820 | KB5037765 |
| LTSC | 2024-04 B | 2024-04-09 | 17763.5696 | KB5036896 |
| LTSC | 2024-03 OOB | 2024-03-25 | 17763.5579 | KB5037425 |
| LTSC | 2024-03 B | 2024-03-12 | 17763.5576 | KB5035849 |
| LTSC | 2024-02 B | 2024-02-13 | 17763.5458 | KB5034768 |
| LTSC | 2024-01 B | 2024-01-09 | 17763.5329 | KB5034127 |
| LTSC | 2023-12 B | 2023-12-12 | 17763.5206 | KB5033371 |
| LTSC | 2023-11 B | 2023-11-14 | 17763.5122 | KB5032196 |
| LTSC | 2023-10 B | 2023-10-10 | 17763.4974 | KB5031361 |
| LTSC | 2023-09 B | 2023-09-12 | 17763.4851 | KB5030214 |
| LTSC | 2023-08 B | 2023-08-08 | 17763.4737 | KB5029247 |
| LTSC | 2023-07 B | 2023-07-11 | 17763.4645 | KB5028168 |
| LTSC | 2023-06 B | 2023-06-13 | 17763.4499 | KB5027222 |
| LTSC | 2023-05 B | 2023-05-09 | 17763.4377 | KB5026362 |
| LTSC | 2023-04 B | 2023-04-11 | 17763.4252 | KB5025229 |
| LTSC | 2023-03 B | 2023-03-14 | 17763.4131 | KB5023702 |
| LTSC | 2023-02 B | 2023-02-14 | 17763.4010 | KB5022840 |
| LTSC | 2023-01 B | 2023-01-10 | 17763.3887 | KB5022286 |
| LTSC | 2022-12 OOB | 2022-12-20 | 17763.3772 | KB5022554 |
| LTSC | 2022-12 B | 2022-12-13 | 17763.3770 | KB5021237 |
| LTSC | 2022-11 OOB | 2022-11-17 | 17763.3653 | KB5021655 |
| LTSC | 2022-11 B | 2022-11-08 | 17763.3650 | KB5019966 |
| LTSC | 2022-10 OOB | 2022-10-17 | 17763.3534 | KB5020438 |
| LTSC | 2022-10 B | 2022-10-11 | 17763.3532 | KB5018419 |
| LTSC | 2022-09 C | 2022-09-20 | 17763.3469 | KB5017379 |
| LTSC | 2022-09 B | 2022-09-13 | 17763.3406 | KB5017315 |
| LTSC | 2022-08 C | 2022-08-23 | 17763.3346 | KB5016690 |
| LTSC | 2022-08 B | 2022-08-09 | 17763.3287 | KB5016623 |
| LTSC | 2022-07 C | 2022-07-21 | 17763.3232 | KB5015880 |
| LTSC | 2022-07 B | 2022-07-12 | 17763.3165 | KB5015811 |
| LTSC | 2022-06 C | 2022-06-23 | 17763.3113 | KB5014669 |
| LTSC | 2022-06 B | 2022-06-14 | 17763.3046 | KB5014692 |
| LTSC | 2022-05 C | 2022-05-24 | 17763.2989 | KB5014022 |
| LTSC | 2022-05 OOB | 2022-05-19 | 17763.2931 | KB5015018 |
| LTSC | 2022-05 B | 2022-05-10 | 17763.2928 | KB5013941 |
| LTSC | 2022-04 C | 2022-04-21 | 17763.2867 | KB5012636 |
| LTSC | 2022-04 B | 2022-04-12 | 17763.2803 | KB5012647 |
| LTSC | 2022-03 C | 2022-03-22 | 17763.2746 | KB5011551 |
| LTSC | 2022-03 B | 2022-03-08 | 17763.2686 | KB5011503 |
| LTSC | 2022-02 C | 2022-02-15 | 17763.2628 | KB5010427 |
| LTSC | 2022-02 B | 2022-02-08 | 17763.2565 | KB5010351 |
| LTSC | 2022-01 C | 2022-01-25 | 17763.2510 | KB5009616 |
| LTSC | 2022-01 OOB | 2022-01-18 | 17763.2458 | KB5010791 |
| LTSC | 2022-01 B | 2022-01-11 | 17763.2452 | KB5009557 |
| LTSC | 2022-01 OOB | 2022-01-04 | 17763.2369 | KB5010196 |
| LTSC | 2021-12 B | 2021-12-14 | 17763.2366 | KB5008218 |
| LTSC | 2021-11 C | 2021-11-22 | 17763.2330 | KB5007266 |
| LTSC | 2021-11 OOB | 2021-11-14 | 17763.2305 | KB5008602 |
| LTSC | 2021-11 B | 2021-11-09 | 17763.2300 | KB5007206 |
| LTSC | 2021-10 C | 2021-10-19 | 17763.2268 | KB5006744 |
| LTSC | 2021-10 B | 2021-10-12 | 17763.2237 | KB5006672 |
| LTSC | 2021-09 C | 2021-09-21 | 17763.2213 | KB5005625 |
| LTSC | 2021-09 B | 2021-09-14 | 17763.2183 | KB5005568 |
| LTSC | 2021-08 C | 2021-08-26 | 17763.2145 | KB5005102 |
| LTSC | 2021-08 B | 2021-08-10 | 17763.2114 | KB5005030 |
| LTSC | 2021-07 OOB | 2021-07-27 | 17763.2091 | KB5005394 |
| LTSC | 2021-07 C | 2021-07-20 | 17763.2090 | KB5004308 |
| LTSC | 2021-07 B | 2021-07-13 | 17763.2061 | KB5004244 |
| LTSC | 2021-07 OOB | 2021-07-06 | 17763.2029 | KB5004947 |
| LTSC | 2021-06 C | 2021-06-15 | 17763.2028 | KB5003703 |
| LTSC | 2021-06 B | 2021-06-08 | 17763.1999 | KB5003646 |
| LTSC | 2021-05 C | 2021-05-20 | 17763.1971 | KB5003217 |
| LTSC | 2021-05 B | 2021-05-11 | 17763.1935 | KB5003171 |
| LTSC | 2021-04 C | 2021-04-22 | 17763.1911 | KB5001384 |
| LTSC | 2021-04 B | 2021-04-13 | 17763.1879 | KB5001342 |
| LTSC | 2021-03 C | 2021-03-25 | 17763.1852 | KB5000854 |
| LTSC | 2021-03 OOB | 2021-03-18 | 17763.1823 | KB5001638 |
| LTSC | 2021-03 OOB | 2021-03-15 | 17763.1821 | KB5001568 |
| LTSC | 2021-03 B | 2021-03-09 | 17763.1817 | KB5000822 |
| LTSC | 2021-02 C | 2021-02-16 | 17763.1790 | KB4601383 |
| LTSC | 2021-02 B | 2021-02-09 | 17763.1757 | KB4601345 |
| LTSC | 2021-01 C | 2021-01-21 | 17763.1728 | KB4598296 |
| LTSC | 2021-01 B | 2021-01-12 | 17763.1697 | KB4598230 |
| LTSC | 2020-12 B | 2020-12-08 | 17763.1637 | KB4592440 |
| LTSC | 2020-11 C | 2020-11-19 | 17763.1613 | KB4586839 |
| LTSC | 2020-11 OOB | 2020-11-17 | 17763.1579 | KB4594442 |
| LTSC | 2020-11 B | 2020-11-10 | 17763.1577 | KB4586793 |
| LTSC | 2020-10 C | 2020-10-20 | 17763.1554 | KB4580390 |
| LTSC | 2020-10 B | 2020-10-13 | 17763.1518 | KB4577668 |
| LTSC | 2020-09 C | 2020-09-16 | 17763.1490 | KB4577069 |
| LTSC | 2020-09 B | 2020-09-08 | 17763.1457 | KB4570333 |
| LTSC | 2020-08 C | 2020-08-20 | 17763.1432 | KB4571748 |
| LTSC | 2020-08 B | 2020-08-11 | 17763.1397 | KB4565349 |
| LTSC | 2020-07 C | 2020-07-21 | 17763.1369 | KB4559003 |
| LTSC | 2020-07 B | 2020-07-14 | 17763.1339 | KB4558998 |
| LTSC | 2020-06 OOB | 2020-06-16 | 17763.1294 | KB4567513 |
| LTSC | 2020-06 B | 2020-06-09 | 17763.1282 | KB4561608 |
| LTSC | 2020-05 B | 2020-05-12 | 17763.1217 | KB4551853 |
| LTSC | 2020-04 C | 2020-04-21 | 17763.1192 | KB4550969 |
| LTSC | 2020-04 B | 2020-04-14 | 17763.1158 | KB4549949 |
| LTSC | 2020-03 OOB | 2020-03-30 | 17763.1132 | KB4554354 |
| LTSC | 2020-03 C | 2020-03-17 | 17763.1131 | KB4541331 |
| LTSC | 2020-03 B | 2020-03-10 | 17763.1098 | KB4538461 |
| LTSC | 2020-02 C | 2020-02-25 | 17763.1075 | KB4537818 |
| LTSC | 2020-02 B | 2020-02-11 | 17763.1039 | KB4532691 |
| LTSC | 2020-01 C | 2020-01-23 | 17763.1012 | KB4534321 |
| LTSC | 2020-01 B | 2020-01-14 | 17763.973 | KB4534273 |
| LTSC | 2019-12 B | 2019-12-10 | 17763.914 | KB4530715 |
| LTSC | 2019-11 B | 2019-11-12 | 17763.864 | KB4523205 |
| LTSC | 2019-10 C | 2019-10-15 | 17763.832 | KB4520062 |
| LTSC | 2019-10 B | 2019-10-08 | 17763.805 | KB4519338 |
| LTSC | 2019-09 OOB | 2019-10-03 | 17763.775 | KB4524148 |
| LTSC | 2019-09 C | 2019-09-24 | 17763.774 | KB4516077 |
| LTSC | 2019-09 OOB | 2019-09-23 | 17763.740 | KB4522015 |
| LTSC | 2019-09 B | 2019-09-10 | 17763.737 | KB4512578 |
| LTSC | 2019-08 C | 2019-08-17 | 17763.720 | KB4512534 |
| LTSC | 2019-08 B | 2019-08-13 | 17763.678 | KB4511553 |
| LTSC | 2019-07 C | 2019-07-22 | 17763.652 | KB4505658 |
| LTSC | 2019-07 B | 2019-07-09 | 17763.615 | KB4507469 |
| LTSC | 2019-06 OOB | 2019-06-26 | 17763.593 | KB4509479 |
| LTSC | 2019-06 C | 2019-06-18 | 17763.592 | KB4501371 |
| LTSC | 2019-06 B | 2019-06-11 | 17763.557 | KB4503327 |
| LTSC | 2019-05 C | 2019-05-21 | 17763.529 | KB4497934 |
| LTSC | 2019-05 OOB | 2019-05-19 | 17763.504 | KB4505056 |
| LTSC | 2019-05 B | 2019-05-14 | 17763.503 | KB4494441 |
| LTSC | 2019-04 C | 2019-05-03 | 17763.475 | KB4495667 |
| LTSC | 2019-04 OOB | 2019-05-01 | 17763.439 | KB4501835 |
| LTSC | 2019-04 B | 2019-04-09 | 17763.437 | KB4493509 |
| LTSC | 2019-03 D | 2019-04-02 | 17763.404 | KB4490481 |
| LTSC | 2019-03 B | 2019-03-12 | 17763.379 | KB4489899 |
| LTSC | 2019-02 D | 2019-03-01 | 17763.348 | KB4482887 |
| LTSC | 2019-02 B | 2019-02-12 | 17763.316 | KB4487044 |
| LTSC | 2019-01 D | 2019-01-22 | 17763.292 | KB4476976 |
| LTSC | 2019-01 B | 2019-01-08 | 17763.253 | KB4480116 |
| LTSC | 2018-12 OOB | 2018-12-19 | 17763.195 | KB4483235 |
| LTSC | 2018-12 B | 2018-12-11 | 17763.194 | KB4471332 |
| LTSC | 2018-11 D | 2018-12-05 | 17763.168 | KB4469342 |
| LTSC | 2018-11 B | 2018-11-13 | 17763.134 | KB4467708 |
| LTSC | 2018-10 D | 2018-11-13 | 17763.107 | KB4464455 |
| LTSC | 2018-10 B | 2018-10-09 | 17763.55 | KB4464330 |
| LTSC | 2018-10 A | 2018-10-02 | 17763.1 |
Windows Server 2016 (OS build 14393)
| Servicing option | Update type | Availability date | Build | KB article |
|---|---|---|---|---|
| LTSB | 2025-02 B | 2025-02-11 | 14393.7785 | KB5052006 |
| LTSB | 2025-01 B | 2025-01-14 | 14393.7699 | KB5049993 |
| LTSB | 2024-12 B | 2024-12-10 | 14393.7606 | KB5048671 |
| LTSB | 2024-11 B | 2024-11-12 | 14393.7515 | KB5046612 |
| LTSB | 2024-10 B | 2024-10-08 | 14393.7428 | KB5044293 |
| LTSB | 2024-09 B | 2024-09-10 | 14393.7336 | KB5043051 |
| LTSB | 2024-08 B | 2024-08-13 | 14393.7259 | KB5041773 |
| LTSB | 2024-07 B | 2024-07-09 | 14393.7159 | KB5040434 |
| LTSB | 2024-06 B | 2024-06-11 | 14393.7070 | KB5039214 |
| LTSB | 2024-05 B | 2024-05-14 | 14393.6981 | KB5037763 |
| LTSB | 2024-04 B | 2024-04-09 | 14393.6897 | KB5036899 |
| LTSB | 2024-03 OOB | 2024-03-22 | 14393.6800 | KB5037423 |
| LTSB | 2024-03 B | 2024-03-12 | 14393.6796 | KB5035855 |
| LTSB | 2024-02 B | 2024-02-13 | 14393.6709 | KB5034767 |
| LTSB | 2024-01 B | 2024-01-09 | 14393.6614 | KB5034119 |
| LTSB | 2023-12 B | 2023-12-12 | 14393.6529 | KB5033373 |
| LTSB | 2023-11 B | 2023-11-14 | 14393.6452 | KB5032197 |
| LTSB | 2023-10 B | 2023-10-10 | 14393.6351 | KB5031362 |
| LTSB | 2023-09 B | 2023-09-12 | 14393.6252 | KB5030213 |
| LTSB | 2023-08 B | 2023-08-08 | 14393.6167 | KB5029242 |
| LTSB | 2023-07 B | 2023-07-11 | 14393.6085 | KB5028169 |
| LTSB | 2023-06 OOB | 2023-06-23 | 14393.5996 | KB5028623 |
| LTSB | 2023-06 B | 2023-06-13 | 14393.5989 | KB5027219 |
| LTSB | 2023-05 B | 2023-05-09 | 14393.5921 | KB5026363 |
| LTSB | 2023-04 B | 2023-04-11 | 14393.5850 | KB5025228 |
| LTSB | 2023-03 B | 2023-03-14 | 14393.5786 | KB5023697 |
| LTSB | 2023-02 B | 2023-02-14 | 14393.5717 | KB5022838 |
| LTSB | 2023-01 B | 2023-01-10 | 14393.5648 | KB5022289 |
| LTSB | 2022-12 B | 2022-12-13 | 14393.5582 | KB5021235 |
| LTSB | 2022-11 OOB | 2022-11-17 | 14393.5502 | KB5021654 |
| LTSB | 2022-11 B | 2022-11-08 | 14393.5501 | KB5019964 |
| LTSB | 2022-10 OOB | 2022-10-18 | 14393.5429 | KB5020439 |
| LTSB | 2022-10 B | 2022-10-11 | 14393.5427 | KB5018411 |
| LTSB | 2022-09 B | 2022-09-13 | 14393.5356 | KB5017305 |
| LTSB | 2022-08 B | 2022-08-09 | 14393.5291 | KB5016622 |
| LTSB | 2022-07 B | 2022-07-12 | 14393.5246 | KB5015808 |
| LTSB | 2022-06 B | 2022-06-14 | 14393.5192 | KB5014702 |
| LTSB | 2022-05 OOB | 2022-05-19 | 14393.5127 | KB5015019 |
| LTSB | 2022-05 B | 2022-05-10 | 14393.5125 | KB5013952 |
| LTSB | 2022-04 B | 2022-04-12 | 14393.5066 | KB5012596 |
| LTSB | 2022-03 B | 2022-03-08 | 14393.5006 | KB5011495 |
| LTSB | 2022-02 B | 2022-02-08 | 14393.4946 | KB5010359 |
| LTSB | 2022-01 OOB | 2022-01-17 | 14393.4889 | KB5010790 |
| LTSB | 2022-01 B | 2022-01-11 | 14393.4886 | KB5009546 |
| LTSB | 2022-01 OOB | 2022-01-05 | 14393.4827 | KB5010195 |
| LTSB | 2021-12 B | 2021-12-14 | 14393.4825 | KB5008207 |
| LTSB | 2021-11 OOB | 2021-11-14 | 14393.4771 | KB5008601 |
| LTSB | 2021-11 B | 2021-11-09 | 14393.4770 | KB5007192 |
| LTSB | 2021-10 B | 2021-10-12 | 14393.4704 | KB5006669 |
| LTSB | 2021-09 B | 2021-09-14 | 14393.4651 | KB5005573 |
| LTSB | 2021-08 B | 2021-08-10 | 14393.4583 | KB5005043 |
| LTSB | 2021-07 OOB | 2021-07-29 | 14393.4532 | KB5005393 |
| LTSB | 2021-07 B | 2021-07-13 | 14393.4530 | KB5004238 |
| LTSB | 2021-07 OOB | 2021-07-07 | 14393.4470 | KB5004948 |
| LTSB | 2021-06 B | 2021-06-08 | 14393.4467 | KB5003638 |
| LTSB | 2021-05 B | 2021-05-11 | 14393.4402 | KB5003197 |
| LTSB | 2021-04 B | 2021-04-13 | 14393.4350 | KB5001347 |
| LTSB | 2021-03 OOB | 2021-03-18 | 14393.4288 | KB5001633 |
| LTSB | 2021-03 B | 2021-03-09 | 14393.4283 | KB5000803 |
| LTSB | 2021-02 B | 2021-02-09 | 14393.4225 | KB4601318 |
| LTSB | 2021-01 B | 2021-01-12 | 14393.4169 | KB4598243 |
| LTSB | 2020-12 B | 2020-12-08 | 14393.4104 | KB4593226 |
| LTSB | 2020-11 OOB | 2020-11-19 | 14393.4048 | KB4594441 |
| LTSB | 2020-11 B | 2020-11-10 | 14393.4046 | KB4586830 |
| LTSB | 2020-10 B | 2020-10-13 | 14393.3986 | KB4580346 |
| LTSB | 2020-09 B | 2020-09-08 | 14393.3930 | KB4577015 |
| LTSB | 2020-08 B | 2020-08-11 | 14393.3866 | KB4571694 |
| LTSB | 2020-07 B | 2020-07-14 | 14393.3808 | KB4565511 |
| LTSB | 2020-06 OOB | 2020-06-18 | 14393.3755 | KB4567517 |
| LTSB | 2020-06 B | 2020-06-09 | 14393.3750 | KB4561616 |
| LTSB | 2020-05 B | 2020-05-12 | 14393.3686 | KB4556813 |
| LTSB | 2020-04 C | 2020-04-21 | 14393.3659 | KB4550947 |
| LTSB | 2020-04 B | 2020-04-14 | 14393.3630 | KB4550929 |
| LTSB | 2020-03 C | 2020-03-17 | 14393.3595 | KB4541329 |
| LTSB | 2020-03 B | 2020-03-10 | 14393.3564 | KB4540670 |
| LTSB | 2020-02 C | 2020-02-25 | 14393.3542 | KB4537806 |
| LTSB | 2020-02 B | 2020-02-11 | 14393.3504 | KB4537764 |
| LTSB | 2020-01 C | 2020-01-23 | 14393.3474 | KB4534307 |
| LTSB | 2020-01 B | 2020-01-14 | 14393.3443 | KB4534271 |
| LTSB | 2019-12 B | 2019-12-10 | 14393.3384 | KB4530689 |
| LTSB | 2019-11 B | 2019-11-12 | 14393.3326 | KB4525236 |
| LTSB | 2019-10 C | 2019-10-15 | 14393.3300 | KB4519979 |
| LTSB | 2019-10 B | 2019-10-08 | 14393.3274 | KB4519998 |
| LTSB | 2019-09 OOB | 2019-10-03 | 14393.3243 | KB4524152 |
| LTSB | 2019-09 C | 2019-09-24 | 14393.3242 | KB4516061 |
| LTSB | 2019-09 OOB | 2019-09-23 | 14393.3206 | KB4522010 |
| LTSB | 2019-09 B | 2019-09-10 | 14393.3204 | KB4516044 |
| LTSB | 2019-08 C | 2019-08-17 | 14393.3181 | KB4512495 |
| LTSB | 2019-08 B | 2019-08-13 | 14393.3144 | KB4512517 |
| LTSB | 2019-07 C | 2019-07-16 | 14393.3115 | KB4507459 |
| LTSB | 2019-07 B | 2019-07-09 | 14393.3085 | KB4507460 |
| LTSB | 2019-06 OOB | 2019-06-27 | 14393.3056 | KB4509475 |
| LTSB | 2019-06 C | 2019-06-18 | 14393.3053 | KB4503294 |
| LTSB | 2019-06 B | 2019-06-11 | 14393.3025 | KB4503267 |
| LTSB | 2019-05 C | 2019-05-23 | 14393.2999 | KB4499177 |
| LTSB | 2019-05 OOB | 2019-05-19 | 14393.2972 | KB4505052 |
| LTSB | 2019-05 B | 2019-05-14 | 14393.2969 | KB4494440 |
| LTSB | 2019-04 C | 2019-04-25 | 14393.2941 | KB4493473 |
| LTSB | 2019-04 OOB | 2019-04-25 | 14393.2908 | KB4499418 |
| LTSB | 2019-04 B | 2019-04-09 | 14393.2906 | KB4493470 |
| LTSB | 2019-03 C | 2019-03-19 | 14393.2879 | KB4489889 |
| LTSB | 2019-03 B | 2019-03-12 | 14393.2848 | KB4489882 |
| LTSB | 2019-02 C | 2019-02-19 | 14393.2828 | KB4487006 |
| LTSB | 2019-02 B | 2019-02-12 | 14393.2791 | KB4487026 |
| LTSB | 2019-01 C | 2019-01-17 | 14393.2759 | KB4480977 |
| LTSB | 2019-01 B | 2019-01-08 | 14393.2724 | KB4480961 |
| LTSB | 2018-12 OOB | 2018-12-19 | 14393.2670 | KB4483229 |
| LTSB | 2018-12 B | 2018-12-11 | 14393.2665 | KB4471321 |
| LTSB | 2018-11 OOB | 2018-12-03 | 14393.2641 | KB4478877 |
| LTSB | 2018-11 C | 2018-11-27 | 14393.2639 | KB4467684 |
| LTSB | 2018-11 B | 2018-11-13 | 14393.2608 | KB4467691 |
| LTSB | 2018-10 C | 2018-10-18 | 14393.2580 | KB4462928 |
| LTSB | 2018-10 B | 2018-10-09 | 14393.2551 | KB4462917 |
| LTSB | 2018-09 C | 2018-09-20 | 14393.2515 | KB4457127 |
| LTSB | 2018-09 B | 2018-09-11 | 14393.2485 | KB4457131 |
| LTSB | 2018-08 C | 2018-08-30 | 14393.2457 | KB4343884 |
| LTSB | 2018-08 B | 2018-08-14 | 14393.2430 | KB4343887 |
| LTSB | 2018-07 OOB | 2018-07-30 | 14393.2396 | KB4346877 |
| LTSB | 2018-07 C | 2018-07-24 | 14393.2395 | KB4338822 |
| LTSB | 2018-07 OOB | 2018-07-16 | 14393.2368 | KB4345418 |
| LTSB | 2018-07 B | 2018-07-10 | 14393.2363 | KB4338814 |
| LTSB | 2018-06 C | 2018-06-21 | 14393.2339 | KB4284833 |
| LTSB | 2018-06 B | 2018-06-12 | 14393.2312 | KB4284880 |
| LTSB | 2018-05 C | 2018-05-17 | 14393.2273 | KB4103720 |
| LTSB | 2018-05 B | 2018-05-08 | 14393.2248 | KB4103723 |
| LTSB | 2018-04 C | 2018-04-17 | 14393.2214 | KB4093120 |
| LTSB | 2018-04 B | 2018-04-10 | 14393.2189 | KB4093119 |
| LTSB | 2018-03 OOB | 2018-03-29 | 14393.2156 | KB4096309 |
| LTSB | 2018-03 C | 2018-03-22 | 14393.2155 | KB4088889 |
| LTSB | 2018-03 B | 2018-03-13 | 14393.2125 | KB4088787 |
| LTSB | 2018-02 C | 2018-02-22 | 14393.2097 | KB4077525 |
| LTSB | 2018-02 B | 2018-02-13 | 14393.2068 | KB4074590 |
| LTSB | 2018-01 C | 2018-01-17 | 14393.2035 | KB4057142 |
| LTSB | 2018-01 B | 2018-01-03 | 14393.2007 | KB4056890 |
| LTSB | 2017-12 B | 2017-12-12 | 14393.1944 | KB4053579 |
| LTSB | 2017-11 C | 2017-11-27 | 14393.1914 | KB4051033 |
| LTSB | 2017-11 B | 2017-11-14 | 14393.1884 | KB4048953 |
| LTSB | 2017-10 OOB | 2017-11-02 | 14393.1797 | KB4052231 |
| LTSB | 2017-10 C | 2017-10-17 | 14393.1794 | KB4041688 |
| LTSB | 2017-10 B | 2017-10-10 | 14393.1770 | KB4041691 |
| LTSB | 2017-09 C | 2017-09-28 | 14393.1737 | KB4038801 |
| LTSB | 2017-09 B | 2017-09-12 | 14393.1715 | KB4038782 |
| LTSB | 2017-08 OOB | 2017-08-28 | 14393.1670 | KB4039396 |
| LTSB | 2017-08 C | 2017-08-16 | 14393.1613 | KB4034661 |
| LTSB | 2017-08 B | 2017-08-08 | 14393.1593 | KB4034658 |
| LTSB | 2017-08 OOB | 2017-08-07 | 14393.1537 | KB4038220 |
| LTSB | 2017-07 C | 2017-07-18 | 14393.1532 | KB4025334 |
| LTSB | 2017-07 B | 2017-07-11 | 14393.1480 | KB4025339 |
| LTSB | 2017-06 C | 2017-06-27 | 14393.1378 | KB4022723 |
| LTSB | 2017-06 B | 2017-06-13 | 14393.1358 | KB4022715 |
| LTSB | 2017-05 B | 2017-05-09 | 14393.1198 | KB4019472 |
| LTSB | 2017-04 B | 2017-04-11 | 14393.1066 | KB4015217 |
| LTSB | 2017-03 OOB | 2017-03-20 | 14393.969 | KB4015438 |
| LTSB | 2017-03 B | 2017-03-14 | 14393.953 | KB4013429 |
| LTSB | 2017-01 B | 2017-01-10 | 14393.693 | KB3213986 |
| LTSB | 2016-12 B | 2016-12-13 | 14393.576 | KB3206632 |
| LTSB | 2016-11 C | 2016-12-09 | 14393.479 | KB3201845 |
| LTSB | 2016-11 B | 2016-11-08 | 14393.447 | KB3200970 |
| LTSB | 2016-10 D | 2016-10-27 | 14393.351 | KB3197954 |
| LTSB | 2016-10 B | 2016-10-11 | 14393.321 | KB3194798 |
| LTSB | 2016-09 D | 2016-09-29 | 14393.222 | KB3194496 |
| LTSB | 2016-09 B | 2016-09-20 | 14393.187 | KB3193494 |
| LTSB | 2016-09 B | 2016-09-13 | 14393.187 | KB3189866 |
| LTSB | 2016-08 E | 2016-08-31 | 14393.105 | KB3176938 |
| LTSB | 2016-08 D | 2016-08-23 | 14393.82 | KB3176934 |
| LTSB | 2016-08 B | 2016-08-09 | 14393.51 | KB3176495 |
| LTSB | 2016-08 A | 2016-08-02 | 14393.10 | KB3176929 |
Conclusion
Choosing the right Windows Server OS and servicing channel is a strategic decision for any organization. The Long-Term Servicing Channel offers stability and a predictable lifecycle for traditional workloads, while the Annual Channel provides rapid innovation for those embracing modern application development. Staying informed about the release history and update cadence ensures your Windows Server OS environment remains secure, performant, and aligned with your business objectives. By understanding the nuances of each channel and version, you can optimize your server infrastructure and leverage the full potential of Windows Server OS.
