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

Question

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

Solutions2Share

Answer 1

Hi @Vincent Lehmann

You need to contact Microsoft Support to unblock your tenant.

See similar question.

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Hope this helps.

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Answer 2

You may be able to unblock using these steps:

https://learn.microsoft.com/en-us/defender-office-365/outbound-spam-restore-restricted-users

If not, then a ticket to support is required.