Microsoft.Azure.TrustedSigningClientTools installs the plugin that lets SignTool sign Windows binaries through Azure Trusted Signing, keeping private keys in the service instead of on build machines.
Microsoft.Azure.TrustedSigningClientTools is the client-side package that connects Windows signing tools to Azure Trusted Signing. It installs a library plugin SignTool loads at signing time, so a familiar command still performs the work while the certificate stays in the cloud. Set-up means writing a small JSON file with the account endpoint, account name and certificate profile, then pointing SignTool at both that file and the plugin. Certificates issued by the service are short-lived, so a trusted timestamp is part of every practical command. The result is that Microsoft.Azure.TrustedSigningClientTools produces code-signed installers, executables and drivers without tokens, smart cards or exported keys on a build agent.
The package exists because signing rules changed, and pipelines cannot babysit a certificate store. Installing Microsoft.Azure.TrustedSigningClientTools gives every agent identical behaviour, so a signature produced on a developer laptop matches one produced on a hosted runner. Authentication runs through the standard Azure credential chain, covering managed identity, workload identity, environment credentials, the Azure CLI, PowerShell and Visual Studio sign-in. Region endpoints belong in the metadata file, and a mismatch between endpoint and certificate profile is the usual cause of a 403 response. Configuration is deliberately file-based and reviewable, which is the same principle behind tools as different as Azure Data Studio and a command-line signing client.
The first benefit is that the private key never travels. Signing happens inside the service against a validated certificate profile, so there is no token to plug in, no exported key to protect and no certificate store to rotate by hand. The second benefit is consistency: because Microsoft.Azure.TrustedSigningClientTools installs the same plugin everywhere, a signature created on a workstation and one created in a release pipeline behave identically, and both can be timestamped by the same public authority so they remain valid after the short certificate lifetime ends. Third, access is governed properly, since signing rights come from a role assignment on the profile rather than from possession of a file, and revocation is immediate. Fourth, the configuration is auditable: the metadata file can be versioned alongside the pipeline and can carry a correlation identifier that ties a signature back to a specific build. Finally, Microsoft.Azure.TrustedSigningClientTools keeps the command line workflow that teams already automate, so adoption rarely means rewriting build scripts.
Key capabilities and highlights.
Microsoft.Azure.TrustedSigningClientTools installs the library plugin that SignTool loads when it signs a file, so existing signing commands keep their shape while the signature itself comes from the service. The installer also lays down the supporting components the plugin expects, which removes a manual copy step from image build scripts.
A single JSON file records the account endpoint, account name and certificate profile that a signature should use, with an optional correlation identifier for tracing. Keeping that data in a file rather than in command arguments makes the configuration reviewable in source control and simple to swap between environments.
Signing requests authenticate through the standard Azure credential chain instead of a stored secret. Managed identity, workload identity, environment credentials, the Azure CLI, PowerShell, Visual Studio and interactive browser sign-in are attempted in order, and any of the sources can be excluded when a pipeline must use one predictable method.
The endpoint value in the metadata file has to match the region of both the signing account and the certificate profile. A mismatch returns a 403 response and an internal signer failure, so documenting the correct regional endpoint for each environment prevents an afternoon of misleading pipeline errors.
Certificates issued by the service are short-lived, so a signature needs a trusted timestamp to keep validating afterwards. Microsoft.Azure.TrustedSigningClientTools works with Microsoft's public timestamp authority, and the timestamp switches sit alongside the plugin arguments in the same command, which keeps releases verifiable even months after the build ran.
Both 32-bit and 64-bit versions of the signing components are provided, and each has to be paired with the matching SignTool binary. Mixing them produces failures that look unrelated to architecture, so keeping the pair consistent is the difference between a clean release and a long debugging session.
The tools install through the Windows Package Manager with a single command, or silently from the MSI for locked-down images. Because Microsoft.Azure.TrustedSigningClientTools can be provisioned from the same script that prepares the rest of a build agent, no interactive setup is needed on headless machines.
The same service can be reached through a GitHub action, an Azure DevOps task, a PowerShell module for Authenticode signing and an SDK for custom tooling. Teams can therefore begin with the command-line client and move to a native pipeline step later without touching certificate profiles or account settings.
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Common questions about Microsoft.Azure.TrustedSigningClientTools.
It installs the client components that let Windows signing tools use Azure Trusted Signing. The main piece is a library plugin SignTool loads at signing time, together with the metadata handling that reads your account endpoint, account name and certificate profile from a JSON file.
No. The certificate lives in the service, tied to a profile you created in Azure, so nothing has to be imported into a store or pinned on an agent. Rotating or renewing it does not require touching every machine that signs releases.
You need a paid Azure subscription with a signing account, a completed identity validation and at least one certificate profile, plus the role that allows the pipeline identity to sign with that profile. Missing any of those produces access errors long before the plugin is the problem.
Usually because the endpoint in the metadata file does not match the region of the signing account or certificate profile, or because the signing identity lacks the profile role. Both causes look similar in the logs, so checking the endpoint and the role assignment first saves time.
In practice, yes. Certificates from the service remain valid for only a short period, so a signed file without a trusted timestamp stops verifying once that window closes. Microsoft's public timestamp authority is the recommended service to attach.
Yes. It is available through the Windows Package Manager for unattended installs, and the underlying MSI can run quietly from a provisioning script. That matters for container images and build agents where nobody is present to click through a setup wizard.
Anything the signing tool already handles, which covers Windows executables, installers, drivers and other artefacts expecting an Authenticode signature. The plugin only supplies the signing step, so the rest of the toolchain still decides what the pipeline produces.
No. SignTool does the work and the plugin simply redirects the signing operation to Azure. A current Windows SDK build of SignTool, the .NET runtime and the Visual C++ redistributable must be present for the combination to run correctly.
Microsoft.Azure.TrustedSigningClientTools installs the plugin that lets SignTool sign Windows binaries through Azure Trusted Signing, keeping private keys in the service instead of on build machines.
Microsoft.Azure.ArtifactSigningClientTools is the Windows package that installs the Artifact Signing client plugin, letting SignTool sign code and artifacts through Azure without a local certificate.
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