Microsoft Security | Microsoft Entra | Microsoft Entra External ID
Managing external identities to enable secure access for partners, customers, and other non-employees
Urgent help needed! Oneshare and Azure/Entra, invitations blocked due to suspicious activity in directory.
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NKP-9184
0
Reputation points
I've been struggling with this problem since 19 February now.
Account is less than 30 days old and we have our first years payment coming up on 18th of March. I need this fixed promptly as it's affecting our business and I do not want to pay a years subscription if I can't get OneDrive working properly.
I invited 16 external users to a folder on OneShare, a few of them got invited the rest blocked and now I get this message everytime I try to invite an external contact to a folder in OneShare.
"Please configure B2B collaboration settings correctly and troubleshoot first, "https://aka.ms/b2b-troubleshoot". Error from Entra B2B: At least one invitation failed. Error: ResponseStatusNotOK, message: Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help.."
I contacted 365 support right away, was on the phone with them from an hour, have sent several emails back and forth. The finally came to the conclusion that they can't help, and advised me to create a support ticket on Azure/Entra instead, which I did a week ago but no one has reached back to me to help.
What do I do!? After using Dropbox for 10 years instead of OneShare I got to admit that this feels completely unprofessional and ridiculous that 16 external user invites triggers a suspicious activity alarm that blocks everything and that I am not able to do something about it despite in putting hours into troubleshooting, being on the phone with support etc.
PLEASE, someone help with solve this ridiculous problem!
Microsoft Security | Microsoft Entra | Microsoft Entra External ID
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VEMULA SRISAI 11,325 Reputation points Microsoft External Staff Moderator2026-03-17T12:10:21.6433333+00:00 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.
could you please share the requested details in private message.
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VEMULA SRISAI 11,325 Reputation points Microsoft External Staff Moderator
2026-03-19T11:35:43.9766667+00:00 NKP could you please share the requested details in private message.
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NKP-9184 0 Reputation points
2026-03-20T13:46:17.91+00:00 Tanks Vemula for your reply.
Yes I know what the reason is and I've been in contact with both Microsoft 365 and Microsoft Entra support, currently have an open support request for this with an SCIM Support Engineer. The engineer as well as the support person from Microsoft 365 have both been very friendly and helpful. But it's been a month now of discussing back and forth, phone calls, teams session, emails. The back end team for Entra need confirmations and all kinds of data and still nothing happens as they appearently have a too big load of critical urgent cases.
The security triggered because I invited 16 external contacts on the same day while being on the first 30 day trial period, apparently there's a limit (not mentioned when starting the trial) that one is only allowed to invite 10 ext. users per day, otherwise this security thing triggers. Comical that there's no warning or indication but instead it blocks the whole Entra for external contacts and sets you in well, limbo for several weeks. Extremely annoying way of handling things if you ask me.
So currently I'm waiting for the Entra backend team to release our org from the suspicious activity block, and that's what our trial period went to. We were about to have to pay for a 12 month sub. on Tuesday but I cancelled the whole thing and had to do a Business Premium trial for now, just waiting on getting them to unblock this.
If you have a quicker way to get them to release the block than what they have through Entra support channels then let me know what to provide you with so we can get this problem out of the way.
Thanks in advance for your reply!
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VEMULA SRISAI 11,325 Reputation points Microsoft External Staff Moderator
2026-03-24T06:09:34.8266667+00:00 NKP-9184 Thank you for letting me know. Could you please confirm if your issue has been resolved? If not, please send me the ticket number in a private message.
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NKP-9184 0 Reputation points
2026-03-27T09:38:11.46+00:00 The problem still hasn't been resolved. And at this point I don't know what to do, we are now running on over five weeks waiting for Microsoft to resolve this problem.
Seems like such a small thing that a suspicious activity has been triggered by 16 external invitations as bulk on a trial period, but I cannot fathom how it can take 5 weeks to resolve?!
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VEMULA SRISAI 11,325 Reputation points Microsoft External Staff Moderator
2026-03-27T10:38:32.5833333+00:00 NKP-9184 could you please share the support ticket id that you have raised in private message.
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Christian Vision Sri Lanka 0 Reputation points2026-04-06T09:02:05.0366667+00:00 NKP-9184 Was your issue finally resolved? I too am in facing the same issue.
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NKP-9184 0 Reputation points
2026-04-09T08:45:57.37+00:00 Yes, the problem has now finally been resolved and I can invite external users again. It was a very long waiting time but our Org needed to be cleared by the Azure backend team if I understood the support person correctly, they were swamped with too much work so we just needed to wait in line until somebody had time to take care of it.
Only problem that now persists is that external guests that have Gmail email addresses that are invited to our Org or to a shared OneDrive folder doesn't get the invitation emails. Other email address get the invitations just as they should. So the problem might be on Googles end of things, but neither Microsoft support nor me has figured this out yet.
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Christian Vision Sri Lanka 0 Reputation points
2026-04-09T10:18:06.6366667+00:00 NKP-9184 Thanks for the update, how long in total did it take to remove block? I'am now waiting for over 23days & it's still not resolved by this" Internal team"I too got blocked trying to share a SharePoint list among some Gmail ID's. The system did not have any warnings in place indicating of a block if limit is exceeded.What a waste of time, nearly a month has gone, which we have paid a monthly subscription also.😡
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NKP-9184 0 Reputation points
2026-04-09T10:38:37.6233333+00:00 No warnings, it took the whole trail period of the Business Standard for me and now I'm on trial for Business Premium. The issue got resolved by support 2 days ago for me, and I caused the block on the 18th or 19th of February. So it is an absurdly long wait.
10 external user invites per day was the quota for an account created less and 30 days ago and on trial period I think, so that's what happened to me when I invited 16 users as a batch the first day I signed up for the trial. Kinda crazy if you ask me, but glad to finally have it working.
Be patient in other words!
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Christian Vision Sri Lanka 0 Reputation points
2026-04-09T12:13:01.78+00:00 NKP-9184 I totally agree, this is absurd for giant like Microsoft, with all the advance ai it took an instant to block ( False positively) but to unblock it needs human intervention which takes months? 😡😡
I hope MS reads these comments and streamlines there help & support for better service.
Thanks for the details.
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