https://gisnexus.palmspringsca.gov/portal/sharing/rest/generateToken
Arcgis server rest service endpoint URL
https://gisnexus.palmspringsca.gov/server/rest/services
How to access arcgis server manager
With federated portal and arcgis server, you must first login portal with portal admin to access arcgis server manager. It is not like before arcMap times, you can directly login arcgis server manager.
https://gisnexus.palmspringsca.gov/server/admin/login
2. webapp URL, please type as
https://gisnexus.palmspringsca.gov/server/admin/
3. copy past token
4. click arcgis manager
5. success