1. Esri ArcGIS Enterprise Documentation (Portal for ArcGIS): "Obtain a portal license file." The documentation states
"If you add or change the user types or add-on app licenses in your organization
you must obtain a new portal license file and reapply it to the portal." This confirms that a new
updated file is required for any additions.
Source: ArcGIS Enterprise 11.0 Documentation
Portal for ArcGIS
Installation and deployment
"Obtain a portal license file".
2. Esri ArcGIS Enterprise Documentation (Portal for ArcGIS): "Manage licenses." This section details the process of importing the license file. It explains
"To update user types or add-on licenses
or to add more of either
you must obtain a new portal license file from My Esri and import it to the portal." This reinforces that a new
comprehensive file is the correct mechanism for adding licenses.
Source: ArcGIS Enterprise 11.0 Documentation
Portal for ArcGIS
Administer
"Manage licenses"
section "Import licenses".