Cross-tenant Access & B2B Trust
The question it answers: Which external tenants can collaborate with this one, and whose MFA and device-compliance claims does Conditional Access trust?
Which external tenants can collaborate with yours, whose MFA and device-compliance claims your Conditional Access accepts, and where shared channels (B2B direct connect) are open. Trusting another tenant’s device compliance means their Intune decides who is ‘compliant’ in yours.
At a glance
Section titled “At a glance”| Where in the app | Entra ID › Identity Hygiene › Cross-tenant Access & B2B Trust |
| Workload | Entra ID |
| Kind | Table |
| Data | Built from the tenant data IntensiveReports keeps in memory and refreshes in the background, so it opens at once. |
| Licence | No extra licence needed. |
| Report id (API and MCP) | entra.security.cross-tenant-access |
Columns
Section titled “Columns”| Column | Key | Type |
|---|---|---|
| Tenant | Name | Text |
| Assessment | Severity | Status |
| Findings | Findings | Text |
| B2B in | B2BCollaborationInbound | Text |
| B2B out | B2BCollaborationOutbound | Text |
| Direct connect in | DirectConnectInbound | Text |
| Trust MFA | TrustMfa | Text |
| Trust compliant | TrustCompliantDevice | Text |
| Trust hybrid | TrustHybridJoinedDevice | Text |
| Auto-redeem | AutoRedeemInbound | Text |
What it needs
Section titled “What it needs”Licence: No extra licence needed.
Application permissions on the IntensiveReports app registration (all permissions):
| Permission | API | What it allows | Note |
|---|---|---|---|
Policy.Read.All | Microsoft Graph | Read your organization’s policies | |
CrossTenantInformation.ReadBasic.All | Microsoft Graph | Read cross-tenant basic information |
Data sources it reads
GET /v1.0/policies/crossTenantAccessPolicy/defaultGET /v1.0/policies/crossTenantAccessPolicy/partnersGET /v1.0/tenantRelationships/findTenantInformationByTenantId (names)
Through the API and MCP
Section titled “Through the API and MCP”GET /ir-api/v1/reports/entra.security.cross-tenant-access?size=100An AI assistant reads it with the MCP tool get_report and the id entra.security.cross-tenant-access. The client needs the Read grant for Entra ID. See Using the API.