Unable to join Microsoft Family Safety family group: "Unusual activity detected"

Question

Hello,

I am experiencing an issue when trying to join a Microsoft Family Safety family group.

My Microsoft account is an adult account, and I can sign in to it without any problems. An adult family organizer has sent me an invitation to join their family group.

However, when I click "Join", I receive the following message:

"Unusual activity detected. We detected unusual activity. Please wait for the invitation to be sent again."

Here is what I have already confirmed:

• My Microsoft account works normally.
• I can sign in to Microsoft services without any issues.
• The family organizer has resent the invitation multiple times.
• The error only occurs when I attempt to join the family group.
• My account is an adult account, not a child account.

I would appreciate help with the following questions:

1. What does this message mean?
2. Could it be related to an account security restriction?
3. Are there any steps I can take to successfully join the family group?
4. Has anyone experienced a similar issue and found a solution?

Thank you in advance for your assistance.

Additional information: The organizer can send invitations successfully, but every time I try to accept the invitation, I receive the same "Unusual activity detected" message.

Screenshot of the error can be provided if needed.

Answer 1

This is posted in the Russian section, but since you are using English, the content below has been written in this language. Let me know if you want to change to a different option.

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I understand why this is confusing, Sergey Tulba.

Please note that our forum is a public platform, and we will modify your question to hide private, identifiable information in the description. Kindly ensure that you hide such details the next time you post to protect personal data.

Based on your description, the only thing can be sure right now is that the block is affecting the Family Safety invitation process. We can't determine whether your account's status is accidentally registered as child account or normal sign-in is broken. But you're not the only one ever faced this issue, e.g.

• Unable to accept invitation for Microsoft Family Safety I recevece an error code "Unusual activity …
• "Unusual Activity Detected" When I try to add my account to a family via invite - Microsoft Q&A

The recommended path in situation like this is often to try a newly generated invitation. But since you already tried that multiple times, escalation might be needed. Before that, here's a few quick checks worth trying:

1. Accept the invitation in an InPrivate/Incognito browser window.
2. Change to a different network (another Wi-Fi or mobile data, if possible).
3. If you're using VPN, turn it off. If it's already off or not using, test with VPN once.

If a new invitation still fails, this is time you should reach out to Microsoft Support. They're the only one who can review the Trace ID and check for any issues from the backend-side.

1. Sign in with your account at Contact Us - Microsoft Support 
2. Enter / choose an issue > click Get Help to make a request   
3. Scroll down > Contact Support (if the option is available): 
   1. Or click Ask our Support Assistant instead and follow guidance 
   2. If the issue persists, specifically state in the chat box that you need direct help. 
4. The Contact Support button should appear now > click it > select the chat in browser option. 

Note: The support contact team only works at certain times, so if the last window shows that it's unavailable, try opening it again the next day. If you prefer phone support, you can leave a phone number. This way, they can call you and help you.  

I wish I could help further, but account-security issues can involve internal and private account information. Microsoft Q&A is just a user-to-user support forum, and contributors here do not have access to such data to resolve the matter.