When entering a new cash journal for an organization it is required for the beginning balance to automatically absorb the ending balance of the last closed cash journal for the respective organization and for the Beginning Balance field in the Cash Journal window to be ReadOnly.
A: The mechanism used to overtake the ending balance of the previous cash journal exists and it functions as described (the beginning balance is taken from the last closed cash journal from the respective cash account). In order to prevent the Beginning Balance field from becoming editable, go to the application's dictionary and select the ReadOnly checkbox for the respective window. Safe the changes and reset the cache. From now on, the Beginning Balance is not editable.