To ensure that only users from litwareinc.com can be added to Teams as guest users, you need to configure the guest access settings in Azure Active Directory (AAD). Here are the steps to follow:
Sign in to the Azure portal with your admin credentials.
Go to Azure Active Directory > External identities > External collaboration settings.
Under Collaboration restrictions, select Allow invitations only to the specified domains (most restrictive).
In the Allow invitations to these domains box, enter litwareinc.com. You can also add more domains if you want, separated by commas.
Click Save to apply the settings.
That’s it. You have successfully restricted the guest access in Teams to a specific domain. This means that only users with email addresses from litwareinc.com can be invited as guests to your teams. You can also prevent guests from being added to a specific team by using sensitivity labels1 or PowerShell2.
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