Edit guest user information
To edit guest accounts (such as display name or profile photo), go to your Azure Active Directory portal. For more information, see Understanding Office 365 identity and Azure Active Directory.
Currently, you can't edit guest information from the Microsoft Teams admin center, the Microsoft 365 admin center, or the Exchange admin center.
Guest access vs. external access (federation)
External access (federation) and guest access are different:
Guest access gives access permission to an individual. External access gives access permission to an entire domain.
Guest access, once granted by a team owner, allows a guest to access resources, such as channel discussions and files, for a specific team, and chat with other users in the team they have been invited to. With external access (federated chat), the external chat participants have no access to the inviting organization’s teams or team resources. They can only participate in one-on-one federated chat. Tenant admins can choose between the two communication options depending on which level of collaboration is desirable with the external party. Admins can choose either approaches or both, depending on their organizational needs, but we recommend enabling guest access for a fuller, collaborative Teams experience.
For a detailed comparison, see Manage external access.
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