Starting at ArcGIS 10.4, ArcGIS Pro can be authorized for use by either concurrent use licensing or by connecting to Portal for ArcGIS, which requires an ArcGIS License Manager configuration. The same ArcGIS License Manager that manages concurrent use ArcGIS for Desktop, ArcGIS for Engine, and Esri CityEngine licenses will also manage ArcGIS Pro concurrent use, and ArcGIS Pro named user licenses via Portal for ArcGIS.
All functionality for authorization and configuration of ArcGIS License Manager for ArcGIS for Desktop, ArcGIS for Engine, and Esri CityEngine concurrent use, apply also to ArcGIS Pro concurrent use and remain unchanged with ArcGIS License Manager 10.4 and newer.
For information on installing and authorizing ArcGIS License Manager, please refer to the License Manager Installation and Startup topic. For authorizing ArcGIS Pro concurrent use licenses, please refer to the information contained in the License Manager Installation and Startup. For setting up ArcGIS Pro application to run as either concurrent use, or named user, refer to the ArcGIS Pro help documentation.
Instructions for creating an ArcGIS Pro named user license file, authorizing named user license files on the License Manager, or exporting a portal configuration file from License Manager can be found in the Configure License Manager for use with Portal for ArcGIS topic.
Useful information and best practices for configuring the ArcGIS License Manager for use with Portal for ArcGIS can be found within the Useful Information and Best Practices topic.
Details for administering ArcGIS Pro named user entitlements in the Portal for ArcGIS can be found in the Portal for ArcGIS help documentation.
Information for managing portals and licenses in the ArcGIS Pro software can be found in the ArcGIS Pro Help.