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

Question

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

Carlos Bernardos Cano 0

I tried to invite only 30 external users through the Microsoft Teams web interface and got the error message "Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help.", this is the detailed message:

"error": {

"code": "Forbidden",

"message": "Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help.",

"innerError": {

  "request-id": "b55845cb-81dd-437e-990a-58818c773b66",

  "date": "2026-03-27T12:03:34",

  "client-request-id": "b55845cb-81dd-437e-990a-58818c773b66"

}

}

Now i cannot invite external users anymore, we appreciate your assistance with unblocking this functionality.

Thanmayi Godithi 8,470 Reputation points Microsoft External Staff Moderator

2026-04-07T11:14:04.4166667+00:00

Hi Carlos Bernardos Cano ,

Thank you for reaching out to Microsoft Q&A.

As part of its security enhancements, Microsoft has anomaly detection systems in place to identify unusual activity, such as an unusually high number of invitations being sent from a tenant. If such anomalies are detected, the tenant may be temporarily blocked.

To unblock your tenant, please provide a business justification explaining the need for bulk invitations along with requested details via private message only (do not post publicly).
ArtB 0 Reputation points

2026-04-09T04:52:12.9133333+00:00

To whom and how do I send the business justificaton why I need to invite more guests to my TEAMS.