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Guest Invite Blocking due to suspicious activity

Jelly Cat 0 Reputation points
2025-12-11T07:19:23.2333333+00:00

Hello Microsoft Support Team,

We are also experiencing the Guest Invite Blocking. We use the Bulk Operation feature to create mock guest accounts. We need this data to perform a stress test on our system. Our tenant is more than 30 days old.

Would you mind helping us in this case?

Thank you!

Microsoft Security | Microsoft Entra | Microsoft Entra ID
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  1. Sridevi Machavarapu 8,925 Reputation points Microsoft External Staff Moderator
    2025-12-11T07:25:25.3+00:00

    Hello Jelly Cat,

    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.

    Based on the error message you received it appears that was Invitations are blocked in your tenant due to suspicious activity.

    We addressed this by collaborating with our internal team, who have now unblocked your tenant.

    You can check and confirm whether you were able to access the tenant which was blocked.

    Hope this helps. Let us know if you have any queries. Happy to assist you further.

    If this resolution works, do click Accept Answer and Yes for was this answer helpful, which may help members with similar questions.

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