Is it possible to identify Teams chats with unmanaged accounts?

Hi @Cosme Roberto Jesus Machado da Silva,

Thank you for reaching out with your question. I can understand why receiving a message from an unmanaged Teams account would raise concerns, especially when you’re trying to determine who the sender is.

To help identify the sender, it is possible to check available details directly within Microsoft Teams:

• Open the chat conversation in Teams
• Hover over or click on the sender’s profile (name or avatar)
• Review the profile card, where the email address or domain may be displayed (if shared by the external account)

Please note that the visibility of the sender’s email depends on how the external account is configured. In some cases, particularly with unmanaged or consumer accounts, only a display name may be shown and the full email address may not be available.

Regarding the IP address, this information is not accessible through Microsoft Teams, including the client, admin center, or audit logs. This limitation is by design to protect user privacy and comply with data protection standards. 

Microsoft Teams does not expose the sender’s IP address for chat messages. This is because Teams audit logs only capture service-level activity metadata (such as user identity and timestamps), and do not include network-level details for messaging events.

If the message appears suspicious or unexpected, it is recommended to avoid responding and to review external access settings in Teams to control communication with external users.

I hope this information helps. Please try the steps and let me know whether they resolve the issue. If the problem persists, we can work together to find a solution. 

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Teams unmanaged or external chats do not expose the sender’s IP address to admins or end users. IP-level information is not available through the Teams client or standard admin tools.

For unmanaged or external participants, what can be identified is typically their display name and email identity as presented in the chat (for example, when chatting with people not using Teams, they are brought in as B2B guests or unmanaged accounts with an email-based identity). However, the context provided does not describe any supported method to retrieve the underlying IP address of that sender.

To manage or control such chats, use the existing external access/B2B and messaging policy controls (for example, disabling chat with unmanaged accounts or controlling B2B guest invitations) rather than relying on IP identification.

References:

• Chat with people not using Teams (Preview)
• Prevent spam or phishing attempts from external chats in Microsoft Teams
• Working with Microsoft Teams messaging APIs in Microsoft Graph
• Get-MgUserChat
• Why are some features not available in chat in Microsoft Teams Free?