Microsoft Security | Microsoft Entra | Microsoft Entra External ID
Managing external identities to enable secure access for partners, customers, and other non-employees
Issue: B2B guest invitations blocked due to suspicious activity
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Dave Brickley
5
Reputation points
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.
Microsoft Security | Microsoft Entra | Microsoft Entra External ID
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