How to Remove Unknown Guest Organizations in Microsoft My Account
Question details
The user noticed an unfamiliar organization listed under guest accounts in their Microsoft My Account and wants to understand data exposure and how to remove the connection.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Reviewing linked accounts and organizational permissions in the Microsoft My Account portal.
- Observed behavior
- An unknown organization appears in the guest accounts list, raising concerns about data privacy, security, and the origin of the connection.
Because backend directory changes are required to fully audit and remove guest access, you will need to contact your organization's Microsoft 365 IT administrator before proceeding.
Ask Your IT Administrator to Review and Remove the Guest Connection
Your organization's IT administrator can use Microsoft Entra ID and Exchange admin tools to investigate the origin of the guest connection and revoke it safely.
Guest accounts are usually created when an external organization invites you to collaborate in Microsoft Teams, SharePoint, or Azure AD. Your IT department has the administrative tools necessary to trace this invitation and terminate the relationship.
Ask your administrator to log into the Microsoft Entra admin center with their global or user administrator credentials.
Navigate to 'Users' > 'Guest users' to locate the unfamiliar organization and check the audit logs for when the connection was established.
Open the Exchange admin center and run a message trace targeted at your email address to locate the original invitation email that triggered the connection.
Once identified, the administrator can select the unwanted guest relationship from the directory and permanently remove it to revoke any associated access.
Open a Support Request with Microsoft 365
If the IT administrator cannot find the origin of the guest organization in the logs, they can escalate the issue to Microsoft Support for a back-end investigation.
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Frequently Asked Questions
Why is there an unknown organization in my Microsoft My Account?
This typically happens if your email address was invited to collaborate on files, Microsoft Teams channels, or SharePoint sites by an external company, and the invitation was inadvertently accepted.
Can a guest organization access my private Microsoft files?
No. A guest relationship usually means you have been granted access to their shared resources. It does not automatically grant the external organization access to your personal or corporate data.
Can I remove the guest organization by myself?
You can sometimes leave an organization manually via the 'Organizations' tab in your My Account portal. However, to fully audit the connection and ensure complete removal from the directory, your Microsoft 365 IT administrator should manage it through Microsoft Entra ID.
