With WebOffice 10.6 you also benefit from the diversity of ArcGIS 10.6 Enterprise. ArcGIS Enterprise Support includes the use of WebOffice with ArcGIS Enterprise with a federated server and ArcGIS Server running on a single machine.
From WebOffice 10.6 there is support for true single sign-on authentication when running WebOffice and ArcGIS Enterprise on a federated server using integrated Windows authentication. This allows you to continue to use WebOffice in conjunction with ArcGIS Enterprise functionalities for 3D web scene integration and selected spatial analysis tools.
Note: For the use of WebOffice with ArcGIS Enterprise with a federated server the ArcGIS version 10.6 is recommended.
Note: More information on this topic can be found in the ArcGIS online help in the chapter About using your server with Portal for ArcGIS.
Note: For more information about the authentication type Single Sign On in WebOffice usermanagement, see the chapter Authentication Type SSO.
The further steps for this scenario can be found in the "How-To" chapter Single Sign On from WebOffice and Portal for ArcGIS.