CRM / Sharepoint integration - Trigger plugin when a document is added, updated, removed into Sharepoint

Hi,

for the server to server crm - Sharepoint integration, In CRM, is there any event on which we can fire a plugin or Workflow or something else in order to apply some business logics on it?

I know that CRM hold information about document Locations, but there's no such things for document itself.

Thanks!