After enabled in SharePoint Central Admin, IRM protection can be enabled on individual document libraries within the farm by any site administrator who has full rights to the document library. To enable IRM protection on an individual document library, perform the following steps:
Figure 17.19. Enabling IRM support on a SharePoint document library.
Once enabled, all current documents and future documents in that document library will have the rights protection policy chosen added to them as they are viewed or modified from within the SharePoint Site. To turn off rights protection, just go back into the document library settings and uncheck the box for IRM. This will remove IRM protection for all documents within the library.