When you enable guest access in Teams, those users get brought into your Azure AD environment, but unlike your regular internal users, you have no way of knowing if those external users are still active or not. How do people typically handle this? Do you just monitor sign in activity maybe and disable accounts that had not logged in for a while? Do you require your external users to periodically response to an email saying that are still active? Maybe this not an issue people are typically concerned about so nothing needs to be done? 

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