Create Agent Users in Microsoft Entra ID from Agent Identities, enabling AI agents to act as digital workers with user identity capabilities in Microsoft 365 and Azure environments.

SKILL: Creating Agent Users in Microsoft Entra Agent ID Overview An agent user is a specialized user identity in Microsoft Entra ID that enables AI agents to act as digital workers. It allows agents to access APIs and services that strictly require user identities (e.g., Exchange mailboxes, Teams, org charts), while maintaining appropriate security boundaries. Agent users receive tokens with idtyp=user , unlike regular agent identities which receive idtyp=app . Prerequisites A Microsoft Entra tenant with Agent ID capabilities An agent identity (service principal of type ServiceIdentity ) created from an agent identity blueprint One of the following permissions : AgentIdUser.ReadWrite.IdentityParentedBy (least privileged) AgentIdUser.ReadWrite.All User.ReadWrite.All The caller must have at minimum the Agent ID Administrator role (in delegated scenarios) Important: The identityParentId must reference a true agent identity (created via an agent identity blueprint), NOT a regular application service principal. You can verify by checking that the service principal has @odata.type: microsoft.graph.agentIdentity and servicePrincipalType: ServiceIdentity . Architecture Component Type Token Claim Purpose Agent Identity Service Principal idtyp=app Backend/API operations Agent User User ( agentUser ) idtyp=user Act as a digital worker in M365 Step 1: Verify the Agent Identity Exists Before creating an agent user, confirm the agent identity is a proper agentIdentity type: Verify the response contains: PowerShell Common mistake: Using an app registration's appId or a regular application service principal's id will fail. Only agent identities created from blueprints work. Step 2: Create the Agent User HTTP Request Required Properties Property Type Description accountEnabled Boolean true to enable the account displayName String Human friendly name mailNickname String Mail alias (no spaces/special chars) userPrincipalName String UPN — must be unique in the tenant ( alias@verified domain ) identityParentId String Object ID of the parent agent identity PowerShell Key Notes No password — agent users cannot have passwords. They authenticate via their parent agent identity's credentials. 1:1 relationship — each agent identity can have at most one agent user. Attempting to create a second returns 400 Bad Request . The userPrincipalName must be unique. Don't reuse an existing user's UPN. Step 3: Assign a Manager (Optional) Assigning a manager allows the agent user to appear in org charts (e.g., Teams). PowerShell Step 4: Set Usage Location and Assign Licenses (Optional) A license is needed for the agent user to have a mailbox, Teams presence, etc. Usage location must be set first. Set Usage Location List Available Licenses Requires Organization.Read.All permission. Assign a License PowerShell (all in one) Tip: You can also assign licenses via the Entra admin center under Identity → Users → All users → select the agent user → Licenses and apps. Provisioning Times Service Estimated Time Exchange mailbox 5–30 minutes Teams availability 15 min – 24 hours Org chart / People search Up to 24–48 hours SharePoint / OneDrive 5–30 minutes Global Address List Up to 24 hours Agent User Capabilities ✅ Added to Microsoft Entra groups (including dynamic groups) ✅ Access user only APIs ( idtyp=user tokens) ✅ Own a mailbox, calendar, and contacts ✅ Participate in Teams chats and channels ✅ Appear in org charts and People search ✅ Added to administrative units ✅ Assigned licenses Agent User Security Constraints ❌ Cannot have passwords, passkeys, or interactive sign in ❌ Cannot be assigned privileged admin roles ❌ Cannot be added to role assignable groups ❌ Permissions similar to guest users by default ❌ Custom role assignment not available Troubleshooting Error Cause Fix Agent user IdentityParent does not exist identityParentId points to a non existent or non agent identity object Verify the ID is an agentIdentity service principal, not a regular app 400 Bad Request (identityParentId already linked) The agent identity already has an agent user Each agent identity supports only one agent user 409 Conflict on UPN The userPrincipalName is already taken Use a unique UPN License assignment fails Usage location not set Set usageLocation before assigning licenses References [Agent identities](https://learn.microsoft.com/en us/entra/agent id/identity platform/agent identities) [Agent users](https://learn.microsoft.com/en us/entra/agent id/identity platform/agent users) [Agent service principals](https://learn.microsoft.com/en us/entra/agent id/identity platform/agent service principals) [Create agent identity blueprint](https://learn.microsoft.com/en us/entra/agent id/identity platform/create blueprint) [Create agent identities](https://learn.microsoft.com/en us/entra/agent id/identity platform/create delete agent identities) [agentUser resource type (Graph API)](https://learn.microsoft.com/en us/graph/api/resources/agentuser?view=graph rest beta) [Create agentUser (Graph API)](https://learn.microsoft.com/en us/graph/api/agentuser post?view=graph rest beta)

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