Checking Where Tenant Users Go as Guests

After all the fuss about Teams users inviting people to chat via email, tenant administrators realize that knowing where users are active as guest accounts is not as easy as it might seem. Part of the problem is that data about user activity is mostly controlled by host rather than home tenants. However, it’s possible to extract some information from audit sign-in logs to figure out where tenant users go as guests.

https://office365itpros.com/2025/12/09/external-guest-activity/