B2B guest invitations blocked due to suspicious activity - request to unblock tenant

Hello,

Our Microsoft Entra tenant has been blocked from sending B2B guest invitations.

We performed a legitimate one-time bulk invitation of approximately 30 known colleagues/business users. The first 8 invitations succeeded, after which every subsequent invitation failed with:

“Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help.”

These are legitimate business users who require access to our internal applications. This is not unsolicited invitation activity or spam.

We are Global Administrators of the tenant.

Could you please escalate this to the appropriate backend/Data Protection team and remove the B2B invitation restriction?

We can provide the Tenant ID, request IDs and timestamps privately if required.