When trying to pre-stage the correct screen orientation it is important to ensure that the physical screen is installed in the correct or at least the same orientation each time.
Generally the standard rotation for Portrait is 90 degrees, but if the screen is installed in the other orientation then the rotation for Portrait becomes 270 degrees.
There are three ways in which you can correct the screen orientation.
1. Set the rotation in the CDM policy in the Organisation Unit (OU) to 90 or 270.
2. Set the rotation in the MeldCX backend.
3. Physically plug in a keyboard and press Ctrl + Shift + F3 to rotate the app 90 degrees each time, until the screen is showing in the correct orientation.