sharepoint 2013 небось
Enterprise Portal on Microsoft SharePoint 2013 [AX 2012] раздел Known issues and updates
Цитата:
Unable to install or configure Enterprise Portal: Installation can fail if the Claims to Windows Token Service is not running in SharePoint Central Administration. The Setup log file includes the following error: Server was unable to process request. ---> Could not retrieve a valid Windows identity. ---> The message could not be dispatched because the service at the endpoint address 'net.pipe://localhost/s4u/022694f3-9fbd-422b-b4b2-312e25dae2a2' is unavailable for the protocol of the address.
To resolve this issue, in SharePoint Central Administration, click System Settings > Manage services on server. Start the Claims to Windows Token Service and then install Enterprise Portal.