Blocked user licenses for Skype Meeting Broadcast
Unfortunately, there are certain user licenses that are blocked when users go to https://broadcast.skype.com and want to use Skype Meeting Broadcast. If a user sees this message, they have one of the blocked licenses assigned to them. If you still want them to use it, assign them another Office 365 license.
"Your company policy doesn't allow you to use Skype Meeting Broadcast. Check with your system admin to make sure the service is enabled and that you have the correct license."
Blocked user licenses
Skype Meeting Broadcast will be blocked if any of the following user licenses are assigned to a user.
Office 365 Education Fac/Staff
Office 365 Education Student
Office 365 Education Plus Fac/Staff
Office 365 Education Plus Student
Office 365 Education E1 Fac/Staff
Office 365 Education E1 Student
Office 365 Education E3 Fac/Staff
Office 365 Education E3 Fac/Staff Large
Office 365 Education E3 Student
Office 365 A1 student use benefit
Microsoft 365 A1 student use benefits