Inviting users to a content item for collaboration (Community 5.0.a)

[tim4dev]

I'm a newbie.

I read the documentation:
«Inviting users to a content item for collaboration»
http://docs.alfresco.com/community/tasks/tuh-content-inviteuser.html

«3. In the Actions list, click <strong>Manage Content Users</strong>.
4. On the Manage Content Users page, click <strong>Invite</strong>.»

But …. I do not see the item <strong>Manage Content Users</strong>.
See attachment (screenshot).

What am I doing wrong?

Thanks.

[sanket]

Login to alfresco explorer :
http://localhost:8080/alfresco and go to the same location.
Here, you will find that option.