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Choosing the right edition of Windows Server is essential for meeting your organization's technical and business requirements. This article provides a side-by-side comparison of key operating system locks and limits across supported Windows Server editions. Use these tables to compare key features across Windows Server editions, such as:
- Maximum number of users
- Connection limits
- Virtualization rights
- Hardware support
This information can help you choose the version that best fits your needs.
Select a Windows Server release to view its locks and limits.
Locks and limits
To view the locks and limits for Windows Server 2025, select the full comparison tab or the version differences tab.
Locks and limits | Windows Server 2025 Standard | Windows Server 2025 Datacenter | Windows Server 2025 Datacenter: Azure Edition |
---|---|---|---|
Maximum number of users | Based on CALs | Based on CALs | Based on CALs |
Maximum SMB connections | 16,777,216 | 16,777,216 | 16,777,216 |
Maximum RRAS connections | Unlimited | Unlimited | Unlimited |
Maximum IAS connections | 2,147,483,647 | 2,147,483,647 | 2,147,483,647 |
Maximum RDS connections | 65,535 | 65,535 | 65,535 |
Maximum number of 64-bit sockets | 64 | 64 | 64 |
Maximum number of cores | Unlimited | Unlimited | 2,048 logical processors |
Maximum RAM |
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|
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Can be used as virtualization guest | Yes; 2 virtual machines, plus one Hyper-V host per license | Yes; unlimited virtual machines, plus one Hyper-V host per license | Yes; unlimited virtual machines, plus one Hyper-V host per license |
Windows Server Containers | Unlimited | Unlimited | Unlimited |
Virtual OSE/Hyper-V isolated Containers | 2 | Unlimited | Unlimited |
Windows Server Containers | Unlimited Windows containers and up to two Hyper-V containers | Unlimited Windows containers and Hyper-V containers | Unlimited Windows containers and Hyper-V containers |
Storage Replica | 1 partnership and 1 resource group with a single 2TB volume | Unlimited | Unlimited |
To view the locks and limits for Windows Server 2022, select the full comparison tab or the version differences tab.
Locks and limits | Windows Server 2022 Standard | Windows Server 2022 Datacenter | Windows Server 2022 Datacenter: Azure Edition |
---|---|---|---|
Maximum number of users | Based on CALs | Based on CALs | Based on CALs |
Maximum SMB connections | 16,777,216 | 16,777,216 | 16,777,216 |
Maximum RRAS connections | Unlimited | Unlimited | Unlimited |
Maximum IAS connections | 2,147,483,647 | 2,147,483,647 | 2,147,483,647 |
Maximum RDS connections | 65,535 | 65,535 | 65,535 |
Maximum number of 64-bit sockets | 64 | 64 | 64 |
Maximum number of cores | Unlimited | Unlimited | 1,024 logical processors |
Maximum RAM |
|
|
|
Can be used as virtualization guest | Yes; 2 virtual machines, plus one Hyper-V host per license | Yes; unlimited virtual machines, plus one Hyper-V host per license | Yes; unlimited virtual machines, plus one Hyper-V host per license |
Windows Server Containers | Unlimited | Unlimited | Unlimited |
Virtual OSE/Hyper-V isolated Containers | 2 | Unlimited | Unlimited |
Windows Server Containers | Unlimited Windows containers and up to two Hyper-V containers | Unlimited Windows containers and Hyper-V containers | Unlimited Windows containers and Hyper-V containers |
Storage Replica | 1 partnership and 1 resource group with a single 2TB volume | Unlimited | Unlimited |
To view the locks and limits for Windows Server 2019, select the full comparison tab or the version differences tab.
Locks and limits | Windows Server 2019 Standard | Windows Server 2019 Datacenter |
---|---|---|
Maximum number of users | Based on CALs | Based on CALs |
Maximum SMB connections | 16,777,216 | 16,777,216 |
Maximum RRAS connections | Unlimited | Unlimited |
Maximum IAS connections | 2,147,483,647 | 2,147,483,647 |
Maximum RDS connections | 65,535 | 65,535 |
Maximum number of 64-bit sockets | 64 | 64 |
Maximum number of cores | Unlimited | Unlimited |
Maximum RAM | 24 TB | 24 TB |
Can be used as virtualization guest | Yes; 2 virtual machines, plus one Hyper-V host per license | Yes; unlimited virtual machines, plus one Hyper-V host per license |
Windows Server Containers | Unlimited Windows containers and up to two Hyper-V containers | Unlimited Windows containers and Hyper-V containers |
To view the locks and limits for Windows Server 2016, select the full comparison tab or the version differences tab.
Locks and limits | Windows Server 2016 Standard | Windows Server 2016 Datacenter |
---|---|---|
Maximum number of users | Based on CALs | Based on CALs |
Maximum SMB connections | 16,777,216 | 16,777,216 |
Maximum RRAS connections | Unlimited | Unlimited |
Maximum IAS connections | 2,147,483,647 | 2,147,483,647 |
Maximum RDS connections | 65,535 | 65,535 |
Maximum number of 64-bit sockets | 64 | 64 |
Maximum number of cores | Unlimited | Unlimited |
Maximum RAM | 24 TB | 24 TB |
Can be used as virtualization guest | Yes; 2 virtual machines, plus one Hyper-V host per license | Yes; unlimited virtual machines, plus one Hyper-V host per license |