If you ever configured server-based authentication with Dynamics 365 Online and SharePoint On-Premises, chances are you have seen the infamous Failed Authentication – 401 Unauthorized Error when you run the “Enable Server-Based SharePoint Integration’ wizard in Dynamics 365. I have seen this
[Integration] Troubleshooting Dynamics 365 Online – SharePoint On-Premises – Failed Authentication – 401 Unauthorized Error
![[Integration] Troubleshooting Dynamics 365 Online – SharePoint On-Premises – Failed Authentication – 401 Unauthorized Error](https://dyn365apps.com/wp-content/uploads/2017/01/401-Unauthorized-750x350.jpg "[Integration] Troubleshooting Dynamics 365 Online – SharePoint On-Premises – Failed Authentication – 401 Unauthorized Error")