After installation, UMP can be accessed at http://<your_portal>.com but then for some reason the portal returns a listing of its webapps instead of prompting you to login to the portal.
UMP must then be accessed at http://<your_portal>.com/UMP. This usually happens when wasp gets reinstalled, after UMP was up and running.
You can restore the default URL by dropping the ump probe (ump.zip) file from the local Archive back over the wasp.
Effects: Not able to access UMP. List of webapps displayed. UMP Home page not displayed.