This article is useful for IT administrators. The article shows how to disable Microsoft Stream for some or all users in your organization.
You need to be in admin role to perform operations described in this article for your tenant.
When a first user from any organization signs-up for Microsoft Stream using their corporate credentials, Microsoft Stream service is registered as an application in the organization's tenant. The license is automatically assigned to the user who signed up. There are additional licenses available for the IT admin to assign to other users in the organization without them going through the sign up process.
However, there are situations in which IT admins would want to disable employees from using Microsoft Stream (for example, in cases where employees are already using O365 Video or if Microsoft Stream has not been approved by your organization).
How to unlicense Microsoft Stream for users
In case you want to remove Microsoft Stream licenses from users in Office 365 Admin Portal refer this article here. If you want to manage user licenses using PowerShell, refer this article here
Even though as an admin you might have removed Microsoft Stream license from a user, they have the option to sign-up via a free trial and get access to your organization's stream portal.
How to turn OFF Microsoft Stream for everyone
As a tenant admin, log in to the Azure portal with an administrator account.
Navigate to the Azure Active Directory (AAD) section from the left menu.
Click the Enterprise Application item and select All Applications from under the manage section in the left menu item.
Change the filters to Show All Applications with All Application Status and Click Apply
Search for Microsoft Stream Service application from the list of applications or search by the guid 2634dd23-5e5a-431c-81ca-11710d9079f4 for Microsoft Stream Service.
Click the Microsoft Stream Service application and click Properties under Manage from the left blade.
Toggle the Enabled for users to sign-in flag to No.
Click the Save button at the top of the screen.
At this point, as an admin, you have blocked access to all users for get access to Microsoft Stream Service.
Experience when ad-hoc subscriptions is blocked
IT admins should be aware of the following scenario. If there are employees in your organization who have signed up for Microsoft Stream and then you block all ad-hoc subscriptions, new users who try to sign up for Microsoft Stream (and other viral services) will not be able to sign up and will see the following error:
However, for the users who had earlier signed-up, will still be able to sign in and continue to use Microsoft Stream. To block sign in, you can either remove the licenses for each of these users or turn OFF Microsoft Stream as discussed in this article.