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.

Manek Ravi 5

We have been creating an application and inviting a pilot set of users (one by one) using invitations for months without any issues.
Today, were trying to add in around 800 users so that they could access our application. After adding in users (98 successful) (sendEmail=FALSE), every invitation fails with the message above. The block appears to affect the entire tenant. Even single manual invitations are rejected.

Could you please:

Remove the block so we can resume guest invitations.

Locked Question. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

Shubham Sharma 17,925 Reputation points Microsoft External Staff Moderator

2026-04-30T12:05:35.2766667+00:00

Hello Manek Ravi

Thank you for reaching out to Microsoft Q&A.

We need few details to proceed further. Please check your Private messages tab and provide those details.
Manek Ravi 5 Reputation points

2026-04-30T16:50:23.9066667+00:00

I have update them in the Private messages. Thankyou.
Please let me know the next steps.

and is there any limit on adding the rest of the users in one shot?
Shubham Sharma 17,925 Reputation points Microsoft External Staff Moderator

2026-04-30T17:00:36.9133333+00:00

Manek Ravi

We have shared the details with the engineering team, and we will update you once we receive a response
Manek Ravi 5 Reputation points

2026-05-01T18:00:50.5333333+00:00

Just checking in, do we an ETA on when to expect that out.

1 answer

Shubham Sharma 17,925 Reputation points Microsoft External Staff Moderator

2026-04-30T12:05:35.2766667+00:00

Hello Manek Ravi

Thank you for reaching out to Microsoft Q&A.

We need few details to proceed further. Please check your Private messages tab and provide those details.
Manek Ravi 5 Reputation points

2026-04-30T16:50:23.9066667+00:00

I have update them in the Private messages. Thankyou.
Please let me know the next steps.

and is there any limit on adding the rest of the users in one shot?
Shubham Sharma 17,925 Reputation points Microsoft External Staff Moderator

2026-04-30T17:00:36.9133333+00:00

Manek Ravi

We have shared the details with the engineering team, and we will update you once we receive a response
Manek Ravi 5 Reputation points

2026-05-01T18:00:50.5333333+00:00

Just checking in, do we an ETA on when to expect that out.

Answer 1

Shubham Sharma 17,925 Microsoft External Staff Moderator

Manek Ravi

Thank you for your patience.

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.

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