Require MFA

CA003-Global-BaseProtection-RegisterOrJoin-AnyPlatform-MFA

Require MFA

About this policy

The CA003-Global-BaseProtection-RegisterOrJoin-AnyPlatform-MFA policy requires multifactor authentication whenever a user registers or joins a device to Entra ID. Without it, anyone holding a stolen password could quietly register their own device in your tenant and use it as a foothold. The policy covers all users on every platform, with a couple of exclusion groups for break glass accounts, and it makes sure the person adding a device is genuinely who they claim to be.

Policy conditions

Users: All users
Apps: All cloud apps

JSON template

{
  "@odata.context": "https://graph.microsoft.com/beta/$metadata#identity/conditionalAccess/policies/$entity",
  "@odata.type": "#microsoft.graph.conditionalAccessPolicy",
  "@odata.id": "identity/conditionalAccess/policies('5c19fad7-8c1b-4a0e-9087-3423c99680ad')",
  "@odata.editLink": "identity/conditionalAccess/policies('5c19fad7-8c1b-4a0e-9087-3423c99680ad')",
  "templateId": null,
  "displayName": "CA003-Global-BaseProtection-RegisterOrJoin-AnyPlatform-MFA",
  "createdDateTime@odata.type": "#DateTimeOffset",
  "modifiedDateTime@odata.type": "#DateTimeOffset",
  "state@odata.type": "#microsoft.graph.conditionalAccessPolicyState",
  "state": "enabled",
  "deletedDateTime": null,
  "partialEnablementStrategy": null,
  "sessionControls": null,
  "conditions": {
    "@odata.type": "#microsoft.graph.conditionalAccessConditionSet",
    "userRiskLevels@odata.type": "#Collection(microsoft.graph.riskLevel)",
    "userRiskLevels": [],
    "signInRiskLevels@odata.type": "#Collection(microsoft.graph.riskLevel)",
    "signInRiskLevels": [],
    "clientAppTypes@odata.type": "#Collection(microsoft.graph.conditionalAccessClientApp)",
    "clientAppTypes": [
      "all"
    ],
    "platforms": null,
    "locations": null,
    "times": null,
    "deviceStates": null,
    "devices": null,
    "clientApplications": null,
    "agents": null,
    "applications": {
      "@odata.type": "#microsoft.graph.conditionalAccessApplications",
      "includeApplications@odata.type": "#Collection(String)",
      "includeApplications": [],
      "excludeApplications@odata.type": "#Collection(String)",
      "excludeApplications": [],
      "includeUserActions@odata.type": "#Collection(String)",
      "includeUserActions": [
        "urn:user:registerdevice"
      ],
      "includeAuthenticationContextClassReferences@odata.type": "#Collection(String)",
      "includeAuthenticationContextClassReferences": [],
      "applicationFilter": null
    },
    "users": {
      "@odata.type": "#microsoft.graph.conditionalAccessUsers",
      "includeUsers@odata.type": "#Collection(String)",
      "includeUsers": [
        "All"
      ],
      "excludeUsers@odata.type": "#Collection(String)",
      "excludeUsers": [],
      "includeGroups@odata.type": "#Collection(String)",
      "includeGroups": [],
      "excludeGroups@odata.type": "#Collection(String)",
      "excludeGroups": [
        "2802b872-ccfb-4b29-a9a9-459808dfb11b",
        "c4906422-18aa-47d8-b808-8c4919b655d8"
      ],
      "includeRoles@odata.type": "#Collection(String)",
      "includeRoles": [],
      "excludeRoles@odata.type": "#Collection(String)",
      "excludeRoles": [],
      "includeGuestsOrExternalUsers": null,
      "excludeGuestsOrExternalUsers": null
    }
  },
  "grantControls": {
    "@odata.type": "#microsoft.graph.conditionalAccessGrantControls",
    "operator": "OR",
    "builtInControls@odata.type": "#Collection(microsoft.graph.conditionalAccessGrantControl)",
    "builtInControls": [
      "mfa"
    ],
    "customAuthenticationFactors@odata.type": "#Collection(String)",
    "customAuthenticationFactors": [],
    "termsOfUse@odata.type": "#Collection(String)",
    "termsOfUse": [],
    "authenticationStrength@odata.context": "https://graph.microsoft.com/beta/$metadata#identity/conditionalAccess/policies('5c19fad7-8c1b-4a0e-9087-3423c99680ad')/grantControls/authenticationStrength/$entity",
    "authenticationStrength@odata.associationLink": "https://graph.microsoft.com/beta/identity/conditionalAccess/policies('5c19fad7-8c1b-4a0e-9087-3423c99680ad')/grantControls/authenticationStrength/$ref",
    "authenticationStrength@odata.navigationLink": "https://graph.microsoft.com/beta/identity/conditionalAccess/policies('5c19fad7-8c1b-4a0e-9087-3423c99680ad')/grantControls/authenticationStrength",
    "authenticationStrength": null
  },
  "#microsoft.graph.restore": {
    "title": "microsoft.graph.restore",
    "target": "https://graph.microsoft.com/beta/identity/conditionalAccess/policies('5c19fad7-8c1b-4a0e-9087-3423c99680ad')/microsoft.graph.restore"
  },
  "Tag": "jv-CAF-2026.2.1",
  "summary": "The CA003-Global-BaseProtection-RegisterOrJoin-AnyPlatform-MFA policy requires multifactor authentication whenever a user registers or joins a device to Entra ID. Without it, anyone holding a stolen password could quietly register their own device in your tenant and use it as a foothold. The policy covers all users on every platform, with a couple of exclusion groups for break glass accounts, and it makes sure the person adding a device is genuinely who they claim to be."
}