Comparison of locks and limits in Windows Server
In this article
Use this article to compare the operating system locks and limits across the different editions of Windows Server.
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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
4 PB for hosts that support 5-level paging 256 TB for hosts that support 4-level paging
4 PB for hosts that support 5-level paging 256 TB for hosts that support 4-level paging
240 TB for a generation 2 virtual machine 1 TB for a generation 1 virtual machine
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
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Locks and limits
Windows Server 2022 Standard
Windows Server 2022 Datacenter
Windows Server 2022 Datacenter: Azure Edition
Maximum number of cores
Unlimited
Unlimited
2,048 logical processors
Maximum RAM
4 PB for hosts that support 5-level paging 256 TB for hosts that support 4-level paging
4 PB for hosts that support 5-level paging 256 TB for hosts that support 4-level paging
240 TB for a generation 2 virtual machine 1 TB for a generation 1 virtual machine
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
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
Expand table
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
4 PB for hosts that support 5-level paging 256 TB for hosts that support 4-level paging
4 PB for hosts that support 5-level paging 256 TB for hosts that support 4-level paging
240 TB for a generation 2 virtual machine 1 TB for a generation 1 virtual machine
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
Expand table
Locks and limits
Windows Server 2022 Standard
Windows Server 2022 Datacenter
Windows Server 2022 Datacenter: Azure Edition
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
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
Expand table
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
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Locks and limits
Windows Server 2019 Standard
Windows Server 2019 Datacenter
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
Expand table
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
Expand table
Locks and limits
Windows Server 2016 Standard
Windows Server 2016 Datacenter
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