Request to lift B2B Guest Invitation Block on Tenant - HTTP 403 Forbidden

Issue Summary:

Our automated onboarding process using the Microsoft Graph API is blocked. We are receiving an HTTP 403 Forbidden error stating that invitations are blocked due to suspicious activity. This is blocking our legitimate business operations and user onboarding.

Exact Error Message: HTTP 403 Forbidden: "Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help."

Impacted Tenant Details:

• Tenant: belpershedcicgmail.onmicrosoft.com Issue: B2B guest invitations blocked due to suspicious activity Impact: Cannot onboard external members; business operations blocked Error details from Graph: HTTP 403 Forbidden "Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help." Request ID: a4346fee-5d7f-4ea6-8404-b2f5eac60083 Client Request ID: 10d0b410-b685-4050-bf43-993e6c09281a Timestamp: 2026-07-03T22:50:51 We have already verified: - External collaboration settings are permissive - Inviter is Global Administrator and Member user - Same result across accounts and portal/API paths Request: Please route this to the internal risk/abuse team and remove the invitation block for this tenant.

Business Justification:

• We are testing our internal Graph API integration in a development environment, which required generating several test user invitations.

Requested Action: Please route this request to the Data Protection Team or Identity Protection Team to review our tenant telemetry, confirm this is legitimate business activity, and manually lift the invitation restriction.Issue Summary: