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Self-hosted agent authentication options

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Azure Pipelines provides a choice of several authentication options you can use when you are registering an agent. These methods of authentication are used only during agent registration. See Agents communication for details of how agents communicate after registration.

Agent registration method Azure DevOps Services Azure DevOps Server & TFS
Personal access token (PAT) Supported Supported when server is configured with HTTPS
Service Principal (SP) Supported Currently not supported
Device code flow (Microsoft Entra ID) Supported Currently not supported
Integrated Not supported Windows agents only
Negotiate Not supported Windows agents only
Alternate (ALT) Not supported Supported when server is configured with HTTPS

Personal access token (PAT)

Specify PAT for authentication type during agent configuration to use a personal access token to authenticate during agent registration, then specify a personal access token (PAT) with Agent Pools (read, manage) scope (or Deployment group (read, manage) scope for a deployment group agent) can be used for agent registration.

For more information, see Register an agent using a personal access token (PAT)

Service Principal

Specify SP for authentication type during agent configuration to use a service principal to authenticate during agent registration.

For more information, see Register an agent using a Service Principal.

Device code flow

Specify AAD for authentication type during agent configuration to use device code flow to authenticate during agent registration.

For more information, see Register an agent using device code flow.

Integrated

Specify Integrated for authentication type during agent configuration to use integrated Windows authentication to authenticate during agent registration.

Connect a Windows agent to TFS using the credentials of the signed-in user through a Windows authentication scheme such as NTLM or Kerberos.

To use this method of authentication, you must first configure your TFS server.

  1. Sign into the machine where you are running TFS.

  2. Start Internet Information Services (IIS) Manager. Select your TFS site and make sure Windows Authentication is enabled with a valid provider such as NTLM or Kerberos.

Screenshot of IIS TFS windows authentication configuration.

Screenshot of IIS TFS windows authentication with NTLM provider configuration.

Negotiate

Connect to TFS as a user other than the signed-in user through a Windows authentication scheme such as NTLM or Kerberos.

To use this method of authentication, you must first configure your TFS server.

  1. Log on to the machine where you are running TFS.

  2. Start Internet Information Services (IIS) Manager. Select your TFS site and make sure Windows Authentication is enabled with the Negotiate provider and with another method such as NTLM or Kerberos.

Screenshot of IIS TFS windows authentication configuration.

Screenshot of IIS TFS windows authentication with negotiate and NTLM provider configuration.

Alternate (ALT)

Connect to TFS using Basic authentication. To use this method, you must first configure HTTPS on TFS.

To use this method of authentication, you must configure your TFS server as follows:

  1. Sign in to the machine where you are running TFS.

  2. Configure basic authentication. See Using tfx against Team Foundation Server 2015 using Basic Authentication.