Explanation/Reference:
Explanation
If you use SharePoint Server with Microsoft Dynamics CRM, CRM users and non-CRM users can work together as a team to achieve common business goals through improved communication. The document records are stored in SharePoint, and you can view them from within Microsoft Dynamics CRM. In addition, you can take advantage of SharePoint capabilities, such as checking documents in and out, viewing version history, and changing document properties.
Note:
Creating and managing SharePoint document location records. Microsoft Dynamics CRM users can create and manage SharePoint Server document location records after SharePoint Server integration is enabled.
Using the Microsoft Dynamics CRM SDK messages on the SharePointSite and SharePointDocumentLocation entities, you can create, retrieve, update, and delete records.
Performing these operations on SharePoint location records only manipulates the data in Microsoft Dynamics CRM. It does not create, update, or delete the locations on the SharePoint server.
References: https://msdn.microsoft.com/en-us/library/gg309635.aspx