Teams, Microsoft’s Slack Competitor, Is About to Become a Whole Lot More Competitive

The first of these is guest access. Currently on Teams, every person within a chat room must have an account in an organization’s Azure Active Directory. This makes working with outside collaborators awkward, as many of these may not have, and may not want, such an account.

Guest access was announced last September, which would allow organizations to create Teams accounts using any email address rather than specifically requiring an Azure AD account; the feature is finally being rolled out next week. Organizations will have to explicitly enable it for their systems, but once they do, their Teams instance will support guest accounts.

Source: arstechnica.com