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Windows Licensing

Customers can either choose to utilize renting Windows SPLA licensing through US Signal or bring their own licensing.

OpenCloud SPLA Templates

The templates provided in OpenCloud are already pre-configured to use US Signal's KMS Server. The Instance(s) will need to have internet connectivity to license to activate against the KMS Server.

If required, to force activation, use the following steps:

  1. Open a Command Prompt as an Administrator.
  2. type in slmgr.vbs /ato
  3. Hit Enter.

The Instance will register with the US Signal KVM Server and will be given a license. The Instance will re-check in with the KVM Server every 30 days.

Building Custom Templates

If using US Signal's pre-built Templates is not desired, it is possible to build custom Templates or install from an ISO if needed. These instructions will outline pointing the instance to USSignal's KMS Server.

Follow the Steps Below to License the Windows Server:

  1. Open a Command Prompt as an Administrator
  2. Enter slmgr.vbs /ipk GVLK Replace GVLK with one of the keys in the table below.
  3. Enter slmgr.vbs /skms kms.ussignal.cloud
  4. Enter slmgr.vbs /ato
  5. A message should pop up on the screen saying that Licensing was successful.

This is a list of commonly used GLVK Keys:

Windows Version Generic Volume License Key(GLVK)
Windows Server 2019 Standard N69G4-B89J2-4G8F4-WWYCC-J464C
Windows Server 2022 Standard VDYBN-27WPP-V4HQT-9VMD4-VMK7H
Windows Server 2025 Standard TVRH6-WHNXV-R9WG3-9XRFY-MY832

Other GLVK Keys can be found on Microsoft's Website

Only Server Operating Systems are supported via USSignal's KMS Server.

Self-Provided Firewalls

For customers utilizing utilizing their own firewall and wish to utilize SPLA licensing in Opencloud, please ensure your allowing LAN/DMZ traffic outbound to kms.ussignal.cloud on port TCP 1688 (App-IDs: ms-kms and msrpc-base for Palo Alto firewalls)

Bring Your Own Licensing

When using US Signal's pre-built Templates and bringing your own licensing, extra steps will need to be performed. You will need change the Instance to point to another KMS server or use own licensing.

If you need to change to use the product key:

  1. Open a Command Prompt as an Administrator
  2. Enter slmgr.vbs /ckms
  3. Enter slmgr.vbs /ipk KEY Replace KEY with customer provided key.

If you need to change to change the KMS Server:

  1. Open a Command Prompt as an Administrator
  2. Enter slmgr.vbs /skms URL Replace URL with customer provided server/URL.

These steps only need to be performed if you are using US Signal's pre-built Templates. These steps are not required if building custom Templates or installing from ISO