Portal item shows the Internal GIS Server URL - unable to add it to a map

[tigerwoulds]

Running ArcGIS Enterprise 1091. 

I published a map service from a registered data store to our enterprise environment. I can see it in Server Manager and Portal but when I try to add it to a map, I get the error 'Unable to add to map'.

In Server Manager, the rest url shows what I would expect: https://gis.company/arcgis/rest/services/folderName/serviceName

In Portal, the url shows the internal/admin url: https://ip-12-190-111-80.internal:6443/arcgis/rest/services/folderName/serviceName

Why would this happen and what can I do to have the portal item display the correct external url?

[DanReid]

Try this. Log into Portal Administrator Directory, then under System, Properties, set the WebContextURL to be (for example) https://gis.company/arcgis.  Be sure to note what's originally there if you need to change it back.

More info here: https://enterprise.arcgis.com/en/portal/10.9.1/administer/windows/using-a-reverse-proxy-server-with-...