Implement Portal License URL lookup

[SimonSchütte_ct]

Starting with ArcGIS Enterprise 11.4, ArcGIS Pro licenses are managed through Portal, which is great!

However, you need to be really careful when setting the PortalURL in the License dialog in MyEsri. Any typo or incorrect naming can cause issues when trying to get a license from ArcGIS Pro:
https://community.esri.com/t5/arcgis-pro-questions/unable-to-get-arcgis-pro-license-from-portal-for/...
 
Currently, the PortalURL in the Portal license JSON file is encrypted. Therefore we are unable to check if the URL provided in the licensing step was correct.

MyEsri does not have a way to look up which PortalURL was specified for a specific Portal license.

There is an endpoint to get the Portal URLs:
portal.example.com/portal/arcgisuris.xml 
(This is used by ArcGIS Pro during the authentication process)
The endpoint only lists the base and secure URL and some others, but not the actual one configured in the license file.

In the /portal/portaladmin/license endpoint we see all the licenses, but not the URL which was set as portalURL in the Portal license JSON file.
I think this would be the best place to show the URL configured in the license.

Having the lookup function would also help troubleshooting when using the new updatePortalUrl feature, as it does not update the URL in the license. The mismatch would then be identifiable.

[SimonSchütte_ct]

ArcGIS Enterprise 12.1 is planned to come with a license validation endpoint that allows to check if the url from the license matches the configured url of the portal. 
It is not planned to expose the URL that is contained in the license file.

To check which url is configured for a license file, go to My Esri -->  Licensing --> License Files --> Portal for ArcGIS and Pro --> [your license file] Actions: Edit Licensing File pen icon --> confirm and navigate to the step where the url is set. You can look up the set url here or fix typos and recreate the license file.