ArcGIS Pro: The assigned license not found. Contact administrator for more information

Error Message

Attempts to log in to ArcGIS Pro using enterprise credentials fail and the following error message is returned:

Error:   
The assigned license was not found. Please contact your administrator for more information.

Cause

• The Portal for ArcGIS license file is not authorized in ArcGIS License Manager, preventing ArcGIS Pro from validating named user licenses even if the license file is imported into portal.
• ArcGIS Pro is unable to validate the portal license due to a mismatch between the portal URL embedded in the license file, and the portal URL used by ArcGIS Pro, resulting in license validation failure despite successful user authentication.

Note:
ArcGIS Enterprise 11.4 and later do not require ArcGIS License Manager for named user licensing of ArcGIS Pro.

Solution or Workaround

Reauthorize the portal license file in ArcGIS License Manager

1. Cancel the existing Portal for ArcGIS license file in My Esri. Refer to How To: Cancel license files for Portal for ArcGIS in My Esri for instructions.
2. Create a new Portal for ArcGIS license file in My Esri, ensuring the correct user types and extensions are selected. Refer to ArcGIS Enterprise: Obtain a portal license file for more information.
3. Import the new license file into Portal for ArcGIS. Refer to Portal for ArcGIS: Import licenses for instructions.
4. Authorize the portal license file in ArcGIS License Manager to enable named user licensing for ArcGIS Pro. Refer to ArcGIS Desktop: Authorizing the named user authorization file in the License Manager for use with Enterprise portal 10.7 and later for instructions.

Specify the correct URL in the portal license file

1. Edit the portal license file in My Esri to ensure the organization URL matches the portal URL used by ArcGIS Pro. Refer to How To: Edit license files in My Esri for Portal for ArcGIS 10.7 and later versions for instructions.
2. Import the edited license file into Portal for ArcGIS. Refer to Portal for ArcGIS: Import licenses for instructions.