How To Add New Users who have different email addresses to the rest of the team

I’m looking to add several new users to different watchlist on our team account. However, these users are from a third party organisation. When I try to add them, the console returns the following message:

Is there a way I can add users that are not within these domains?

@smudau Currently, only the specified domains are allowed for your account. You can email the support team with details of the new domain you’d like to authorize for use with your account.