Microsoft Active Directory Certificate Services (AD CS)
Certificate lifecycle management (CLM) software
Confidentiality software
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$1,848.00 16-core license pack + 10 CALs
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What is Microsoft Active Directory Certificate Services (AD CS)
Microsoft Active Directory Certificate Services (AD CS) is a Windows Server role that provides an on-premises public key infrastructure (PKI) for issuing and managing X.509 certificates. It is commonly used by IT and security teams to support Windows domain authentication, device/user certificates, internal TLS, and smart card logon. AD CS integrates tightly with Active Directory for certificate templates, auto-enrollment, and policy-based issuance, and it is typically deployed as an enterprise CA within Microsoft-centric environments.
Deep Active Directory integration
AD CS uses Active Directory for publishing CA information, managing certificate templates, and enforcing enrollment policies. Auto-enrollment via Group Policy supports scalable certificate issuance and renewal for domain-joined users and devices. This reduces manual certificate requests in Windows-centric environments and supports common enterprise authentication scenarios.
On-premises CA control
AD CS enables organizations to operate their own certificate authority infrastructure on Windows Server. This supports internal PKI use cases where certificates should not be issued by a public CA, such as internal services, device identity, and smart card logon. It also allows organizations to define their own issuance policies, key sizes, and validity periods within their governance constraints.
Standards-based certificate issuance
AD CS issues standard X.509 certificates and supports common enrollment protocols and interfaces used in Microsoft environments. It can be used to provide TLS certificates for internal services and to support certificate-based authentication. The resulting certificates can be consumed by a wide range of applications and devices that trust the issuing CA.
Limited end-to-end CLM automation
AD CS focuses on CA functions (issuance, templates, revocation) rather than full certificate lifecycle management across heterogeneous environments. Capabilities such as broad discovery of certificates across infrastructure, centralized inventory, and automated remediation workflows typically require additional tooling. Organizations with multi-cloud, multi-CA, or large non-Windows estates may find native lifecycle visibility and automation insufficient.
Operational complexity and risk
Running an enterprise CA requires careful design for CA hierarchy, key protection, backup/restore, and disaster recovery. Misconfiguration of templates, enrollment permissions, or CA settings can lead to over-issuance or privilege escalation paths in Active Directory environments. Ongoing patching and hardening of Windows Server and CA components are necessary to reduce exposure.
Primarily Windows-centric deployment
AD CS is delivered as a Windows Server role and is most straightforward in Active Directory domain environments. Integrations and management workflows are optimized for Microsoft tooling (e.g., Group Policy, MMC, AD objects), which can increase effort for non-domain devices and non-Windows platforms. Organizations seeking a cloud-managed CA service or unified management across multiple CA types may need complementary services.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Windows Server Standard (includes AD CS role) | Suggested MSRP: Variable — contact a Microsoft reseller. Example (Microsoft Store US): Windows Server 2025 Standard 16-core license pack + 10 CALs — $1,848.00. | Core-based licensing (16-core packs). Includes AD CS as a Windows Server role. Windows Server CALs are required for users/devices accessing server services. AD CS is not licensed as a separate product. |
| Windows Server Datacenter (includes AD CS role) | Suggested MSRP: Variable — contact a Microsoft reseller. | For highly virtualized datacenters. Core-based licensing. Includes AD CS role. Requires Windows Server CALs as applicable. |
| Windows Server Evaluation (for testing) | Free evaluation (180-day trial download from Microsoft Evaluation Center). | Full Windows Server functionality (including AD CS) for the evaluation period; must convert to paid license after expiry. |
Notes:
- AD CS is delivered as a Windows Server role (not a standalone paid product). Install and run AD CS on licensed Windows Server instances or on evaluation media for testing.
- Example store pricing is shown on Microsoft Store product pages and is provided as an illustrative, vendor-offered package (16-core license pack + CALs). Actual enterprise pricing is typically provided via resellers or volume-licensing agreements.
Seller details
Microsoft Corporation
Redmond, Washington, United States
1975
Public
https://www.microsoft.com/
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