When attempting to enter credentials for the Desktop Authority Manager or the Operations service during an upgrade it fails and returns an invalid credentials message.
DAInstaller.log may display:
Validation failed: The specified WinService user ('domain\username') is not a domain user.
The Desktop Authority Manager Service or the Desktop Authority Operations Service may not be started and/or may not be using the correct account username or password.
Launch the Desktop Authority Setup Tool and change the accounts/passwords for these two services and try the installation again.