As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.
I am afraid you didn't give enough information to get help from someone in here.
You can find information about the topic in the official documentation:
Aikau Pages | Alfresco Documentation
Surf Pages | Alfresco Documentation
Please, elaborate.