Subscribe to a knowledge article within a knowledge base.
Users can subscribe to a knowledge article from either the
Knowledge Management v3 user interface or the Knowledge Management Service Portal.
Users who are already subscribed to a knowledge base are also subscribed to the
articles within that knowledge base.
To subscribe to articles from the base service portal
(https://<instance name>/sp?), you must navigate to
the Knowledge Management Service Portal pages (for example:
https://<instance name>/sp?id=kb_home)from the base