Block

CIS - Block untrusted locations

Block access

About this policy

The CIS - Block untrusted locations policy prevents all users from accessing any cloud app unless they are signing in from a location defined as trusted in your tenant. It includes all locations and excludes only the AllTrusted set, so any network not explicitly marked as trusted is blocked. This is a strong perimeter control, but it does require that your named trusted locations are properly configured before you enable it.

Policy conditions

Users: All users
Apps: All cloud apps

JSON template

{
  "templateId": null,
  "displayName": "CIS - Block untrusted locations",
  "modifiedDateTime": null,
  "state": "enabledForReportingButNotEnforced",
  "deletedDateTime": null,
  "partialEnablementStrategy": null,
  "sessionControls": null,
  "conditions": {
    "userRiskLevels": [],
    "signInRiskLevels": [],
    "clientAppTypes": [
      "all"
    ],
    "platforms": null,
    "times": null,
    "deviceStates": null,
    "devices": null,
    "clientApplications": null,
    "agents": null,
    "applications": {
      "includeApplications": [
        "All"
      ],
      "excludeApplications": [],
      "includeUserActions": [],
      "includeAuthenticationContextClassReferences": [],
      "applicationFilter": null
    },
    "users": {
      "includeUsers": [
        "All"
      ],
      "excludeUsers": [],
      "includeGroups": [],
      "excludeGroups": [],
      "includeRoles": [],
      "excludeRoles": [],
      "includeGuestsOrExternalUsers": null,
      "excludeGuestsOrExternalUsers": null
    },
    "locations": {
      "includeLocations": [
        "All"
      ],
      "excludeLocations": [
        "AllTrusted"
      ]
    }
  },
  "grantControls": {
    "operator": "OR",
    "builtInControls": [
      "block"
    ],
    "customAuthenticationFactors": [],
    "termsOfUse": [],
    "authenticationStrength@odata.context": "https://graph.microsoft.com/beta/$metadata#identity/conditionalAccess/policies('48fb010e-de96-4603-a562-e6f42cf6e3ea')/grantControls/authenticationStrength/$entity",
    "authenticationStrength": null
  },
  "Tag": "CIS",
  "summary": "The CIS - Block untrusted locations policy prevents all users from accessing any cloud app unless they are signing in from a location defined as trusted in your tenant. It includes all locations and excludes only the AllTrusted set, so any network not explicitly marked as trusted is blocked. This is a strong perimeter control, but it does require that your named trusted locations are properly configured before you enable it."
}