After installing the Okta People Picker for a SharePoint integration, the search works correctly but the attributes are not passed from Okta to a SharePoint Profile. 

The org is running on Okta Identity Engine (OIE) and has integrated with SharePoint (on-premise) 2013 as per the product documentation, Add SharePoint (On-Premises) in Okta, and installed the People Picker. The People Picker search appears to work successfully, however, no attributes are passed from Okta to SharePoint other than the Unique Identifier (ie Email address).

• SharePoint People Picker
• Okta Identity Engine (OIE)

The resolution is to remove and reinstall the Okta Solution (authentication and People Picker). Information on the process is available in the documentation - Uninstall Okta People Picker and Okta authentication. Once this is uninstalled, then reinstall.

NOTE: Restart the IIS server hosting the SharePoint server in between removal and reinstall.