Where can I find the default POS365 customer setting?
You want to see which customer is selected as the POS365 default.
Note: This FAQ uses the POS365 Manager role and English page names. If your screen looks different, follow Access the POS365 UI (user interface) Manager role in Business Central. Changing the language to English is optional, but makes it easier to follow this FAQ.
Answer:
In POS365 Navigation, under POS365 Setup, select PON Integration Setup. On the POS365 Company Integration Setup [PON] list, find the relevant company's row and scroll horizontally to Default Customer. It is immediately before General Ledger Journal.