In Business Central When I go to the OCR Service Setup in the BC then in the OCR Service Setup Card Page there is a General Tab in that Authorization Key Required. and It can be get from Second Tab Service Sign-up URL Field :-
Here are some of the countries where OCR services are commonly available:
Sohail Ahmed
1,200
YUN ZHU
1,006
Super User 2025 Season 1
Mansi Soni
864