The following are 5 key sites to utilize for Dynamics 365 and SharePoint based integration information:
Configure Dynamics 365 Sales to Integrate with SharePoint:
https://docs.microsoft.com/en-us/dynamics365/sales/connect-with-sharepoint?tabs=SE
Manage Your Documents Using SharePoint:
https://docs.microsoft.com/en-us/power-platform/admin/manage-documents-using-sharepoint
Set Up Customer Engagement Apps to use SharePoint Online:
Integrate Dynamics 365 Customer Engagement with SharePoint:
Get Started with SharePoint Integration: