Can I continue making sales if the internet connection is lost?
The POS has lost its internet connection, but customers still need to complete their purchases.
Yes. POS365 can continue processing sales in offline mode. Offline sales are marked with an upward-pointing arrow, and POS365 attempts to upload them every two minutes after connectivity returns.
Some functions that require live Business Central data—including certain customer and gift-card functions—may be unavailable offline.
Indepth guide link: “Offline function in POS365”