New-MgInvitation : Invitations are blocked for this directory due to suspicious activity

Vincent Lehmann 0 Reputation points
2024-11-04T15:24:46.2966667+00:00

Hello community,

Today, we have tried to bulk invite 5000 guest users to one of our tenants using a simple PowerShell command. After inviting 61 users, it blocked all further invitations due to "suspicious actvitiy".

I have seen in a very similar question that someone had this problem before. Is it possible to unblock it ourselves or is this up to Microsoft Support?

Thanks in Advance

Vincent

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Microsoft Graph
Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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  1. CarlZhao-MSFT 42,211 Reputation points
    2024-11-05T06:53:11.7866667+00:00

    Hi @Vincent Lehmann

    You need to contact Microsoft Support to unblock your tenant.

    See similar question.

    Hope this helps.

    If the reply is helpful, please click Accept Answer and kindly upvote it. If you have additional questions about this answer, please click Comment.

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  1. Andy David - MVP 149.1K Reputation points MVP
    2024-11-04T15:28:55.08+00:00

    You may be able to unblock using these steps:

    https://video2.skills-academy.com/en-us/defender-office-365/outbound-spam-restore-restricted-users

    If not, then a ticket to support is required.

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