To establish the connection between POS365 and Business Central, we need you to prepare Business Central with the following.
Define No. Series
• Customer number series - Only numeric, no leading zeros.
• Vendor number series - Only numeric, no leading zeros.
• Set existing customers’ numbers to Only numeric, with no leading zeros.
• Set vendor numbers to Only numeric, with no leading zeros.
• Make sure you have full admin rights in Azure to App registration.
(This setting requires an admin user).