You work as a Systems Administrator for your company. The company has recently purchased a subscription to Microsoft 365. All users in your company have a
Microsoft 365 E3 license.
All users use Microsoft Teams for collaboration. Several teams and channels have been configured.
You need to configure Microsoft Teams to ensure that users within your company can collaborate with users in a partner company. You need to ensure that only external users with the email domain of the partner company can send emails to the team channels.
Which of the following actions should you perform?