Windows Server offers flexible deployment options through its Service Channels, allowing you to choose the release cadence that best suits your needs. This article explores the two primary service channels: the Long-Term Servicing Channel (LTSC) and the Annual Channel (AC), outlining their key differences and helping you determine the optimal choice for your environment.
Choosing the Right Service Channel: LTSC vs. AC
Since September 2023, Windows Server has offered two primary service channels: Long-Term Servicing Channel (LTSC) and the Annual Channel (AC). Understanding the nuances of each is crucial for making informed decisions about your server infrastructure.
Long-Term Servicing Channel (LTSC) for Stability
The LTSC, released every 2-3 years, prioritizes stability and long-term support. Each LTSC release receives five years of mainstream support and an additional five years of extended support, ensuring a decade of security and quality updates. This channel is ideal for organizations with traditional workloads, general-purpose file servers, and those seeking a consistent, predictable update cycle. LTSC supports both Server Core and Server with Desktop Experience installation options.
Annual Channel (AC) for Rapid Innovation
The AC caters to organizations embracing rapid innovation, particularly those focused on containerized applications and microservices. Releases occur approximately every 12 months, providing access to new features and functionalities at a faster pace. Each AC release is supported for 24 months, comprising 18 months of mainstream support and 6 months of extended support. This channel is available to volume-licensed customers with Software Assurance and programs like Visual Studio Subscriptions. It’s important to note that AC releases require clean installations and only support the Server Core installation option.
Key Distinctions Between Service Channels
The following table summarizes the key differences between LTSC and AC:
| Feature | Long-Term Servicing Channel (LTSC) | Annual Channel (AC) |
|---|---|---|
| Release Cycle | Every 2-3 years | Every 12 months |
| Support Duration | 5 years mainstream + 5 years extended | 18 months mainstream + 6 months extended |
| Installation | Server Core & Desktop Experience | Server Core only |
| Ideal Use Cases | Traditional workloads, stability | Containerized apps, rapid innovation |
| Licensing | All licensing programs | Software Assurance customers only |
Servicing and Updates
Both LTSC and AC receive security and non-security updates throughout their respective support lifecycles. Tools like Windows Update, Windows Server Update Services (WSUS), and Microsoft Endpoint Configuration Manager can be used to manage these updates, regardless of the chosen service channel.
Identifying Your Windows Server Service Channel
To determine if a server is running LTSC or AC, use the Get-ComputerInfo PowerShell command:
Get-ComputerInfo | fl WindowsProductName,OSDisplayVersionThe OSDisplayVersion will indicate the release (e.g., 21H2 for LTSC or 23H2 for AC). For versions prior to Windows Server 2022, the OSDisplayVersion is not applicable, and these versions are all LTSC releases.
Conclusion
Selecting the appropriate Windows Server service channel depends on your organization’s specific needs and priorities. The LTSC provides long-term stability and extended support, while the AC offers access to the latest innovations at a faster pace. By understanding the key differences outlined in this article, you can confidently choose the service channel that aligns with your IT strategy and business objectives.
