For a Windows service that needs access to network resources, choose an identity that fits its host count and software support: usually a group managed service account (gMSA) when the service supports it, a standalone managed service account (sMSA) for a single server, or a traditional domain account when managed accounts are not supported. A “network service account” is not one specific Windows account type; each option has different credential management and access boundaries.
What a Windows service account does
A service account is the identity a service uses to access local and network resources. It is not simply a password stored for an application: the identity’s permissions determine what that service can do. Choose an identity supported by the workload, then grant only the access it needs.
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For on-premises services, Microsoft recommends using a gMSA whenever possible. An sMSA is an alternative when gMSA is not supported. The right choice depends on how many computers run the service, application compatibility, directory configuration, and security requirements. See Microsoft’s service account overview and Active Directory service account guidance.
Which account type fits your service?
| Account type | Best fit | Important boundary |
|---|---|---|
| Traditional domain user account | Compatibility fallback when the service cannot use a managed account. | Administrators manage its credentials and rotation under the domain’s password policy. |
| Standalone managed service account (sMSA) | A supported service running on one server. | It cannot be shared across multiple computers. See Microsoft’s sMSA security guidance. |
| Group managed service account (gMSA) | A supported service running on one or more servers, including server farms and some network load-balanced deployments. | Active Directory manages the password, but you must authorize the intended hosts. Cluster support depends on the particular workload and service type. |
| Delegated managed service account (dMSA) | Specific Windows Server 2025 scenarios involving machine-identity-linked authentication or migration from an eligible traditional account. | Support is version- and scenario-specific. Microsoft says a dMSA cannot be migrated from an MSA or gMSA. See the dMSA overview. |
| Virtual account | A locally managed service identity that may access network resources through the computer’s identity. | Network access uses the computer account; it is not a shared identity for multiple hosts. |
Decide based on the number of service hosts, application support, whether clients require the service to present one principal, Windows Server and domain compatibility, and how credentials will be managed. For managed accounts in Microsoft Entra Domain Services, consult the separate Microsoft Entra Domain Services guidance; requirements differ from self-managed AD DS.
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What to check before creating a gMSA
Microsoft’s gMSA management procedure lists several prerequisites. Confirm these in the domain and on the management computer before you begin:
- Active Directory Domain Services (AD DS) is in place.
- Your administrator account has the permissions required for the operation; Microsoft’s documented procedure specifies membership in Domain Admins or Enterprise Admins.
- The domain and forest functional levels are Windows Server 2012 or later for broad gMSA support.
- The domain has a Key Distribution Services (KDS) root key.
- The service and its version support gMSAs, and the computers that need the identity can be authorized to use it.
Microsoft documents the prerequisites and management process in Manage Group Managed Service Accounts. The Active Directory PowerShell module includes cmdlets such as New-ADServiceAccount, Install-ADServiceAccount, and Get-ADServiceAccount; availability and required permissions depend on the management host and domain configuration.
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Set up the identity and configure the service
There is no universal command sequence for every Windows service. Use Microsoft’s instructions for your Windows Server version and the software vendor’s supported configuration method. A typical gMSA rollout follows this order:
- Confirm the workload and host scope. Identify the service, its supported account types, and every computer on which it runs.
- Validate directory prerequisites and permissions. Check AD DS, functional levels, the KDS root key, and administrator authorization.
- Create and authorize the gMSA. In Active Directory, create the account and limit credential retrieval to the computer accounts that need it.
- Install or test the account on each authorized host. Use the supported Active Directory management tools and Microsoft’s setup guidance to verify that each computer can use the identity.
- Configure the service using its supported interface. Apply the gMSA through the service’s management interface or the vendor’s documented procedure rather than assuming one setting works for all services.
- Verify operation and permissions. Confirm the service starts, can reach the required network resources, and has no broader access than necessary.
Apply least privilege and monitor usage
Automatic password management reduces manual credential handling; it does not make an overprivileged account safe. Microsoft’s gMSA security guidance recommends reviewing group membership, removing unnecessary privileged memberships, granting only required rights, and auditing access to sensitive resources.
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- Authorize only the computers that need to retrieve or use the gMSA credentials.
- Use separate identities for separate services when that improves security and makes activity easier to audit.
- Review permissions regularly and remove access the service no longer requires.
- Monitor account use and investigate unexpected source or destination logons. Microsoft’s service account discovery documentation describes monitoring context.
Check cluster and managed-domain compatibility
Do not assume a gMSA works for every failover-cluster deployment. Microsoft says failover clusters do not provide general gMSA support, though certain services operating on the Cluster service can use a gMSA or sMSA if the workload is a Windows service, app pool, scheduled task, or natively supports managed accounts. Verify the exact service and cluster configuration against the gMSA overview.
For dMSAs, follow the Windows Server 2025-specific setup and compatibility requirements in Microsoft’s dMSA setup guide. A dMSA is not a general replacement for every existing managed service account.
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