DRAG DROP
You have an Office 365 tenant that uses an Enterprise E3 subscription.
You must prevent five specific users from using Skype for Business Online to send instant messages to external users. All other users must be able to send instant messages to both internal and external users.
You need to configure the environment.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
communications for specific individuals using these steps. You then choose External communications, and then clear the options as appropriate before saving the changes. individual-users-77b26eac-8228-4161-ba9f-733b187bd836
Answer: 
Explanation:
To block external communications for specific individuals, you should go to the Users page in the Skype for
Business Admin center, select the users whose settings you want to disable, and then choose Edit.
After you enable external excommunications for everyone in your company, you can selectively block external
References: https://support.office.com/en-us/article/Admins-Configure-Skype-for-Business-settings-for-