"The user does not exist or is not unique."

When trying to grant permissions in SharePoint using an SAP Role that has been synced using Duet Enterprise, you may get the following error:

"The user does not exist or is not unique."

In the ULS logs you may see one or both of these entries:

1. "ServiceContext for the http://<sharepointserver:port>/ context is null"

     Where sharepointserver and port are replaced with values from your environment.

     For example:
     "ServiceContext for the https://litware.litware.com:9000/ context is null"


2. System.Runtime.InteropServices.COMException: The user does not exist or is not unique.  
     at Microsoft.SharePoint.Library.SPRequestInternalClass.UpdateMembers(String bstrUrl, …   
     at Microsoft.SharePoint.Library.SPRequest.UpdateMembers(String bstrUrl, …



The Duet Claims Provider, like most SharePoint functionality, requires a root site collection. The error "ServiceContext for the http://sharepointserver:port/ context is null" means that a root site collection could not be found.

For more information about limitations and supportability when no root site collection exists for your SharePoint Web Application, see the following articles:

SharePoint 2010: Supportability of unprovisioned root site in a SharePoint web application

SharePoint: Office client integration errors when no root site exists

Error message when you try to access a UNC Path of a Windows SharePoint Services 3.0 or in SharePoint Server 2007 if no site collection is mapped to the root of the web application: "The network path was not found"



You can confirm if a root site collection exists by navigating to the http://sharepointserver:port/ site in a browser and then see if a SharePoint site is displayed.  If there is no site at that URL, then you will need to create a SharePoint site collection at http://sharepointserver:port/ to resolve this issue. The site template used to create the root site is not important and it can be a blank site.