When installing UPK utilizing Windows Authentication an error saying "User not recognized" after clicking Install:
Prompt Title: Profile Credentials
Enter the login credentials to be used as the initial administrator account to access the Developer. This account will be created in the library.
It would be nice if the documentation was updated to say that when the IIS role is installed, to include the Role Service Windows Authentication.
So to fix this error, add the "Windows Authentication" IIS role service and restart all 3 IIS system services in the MMC Server Manager > Roles > Web Server (IIS)
Application Host Helper Service
Windows Process Activation Service (this will also stop the dependency World Wide Web Publishing Service)
If the World Wide Web Publishing Service does not start on it's own, just click Start on the right hand side.
After that has been completed clear out the Username and Password fields in the Profile Credentials prompt, and click Connect.
I had the same issue when logged in under with the domain credentials. Then I tried to log in into the server using the local credentials, connect to the domain and run the installation files again. That seemed to work without any issues.
I had the same issue. Turned out to be that UPK doesnt install properly on windows R2 SP1, you need to remove the fixpack and reinstall and then apply it again or use an alternative like Windows 2008 Enterprise SP2.