Does the sync works if Quickbooks is logged in with multi user mode?
Our app will continuously queue the data for the sync irrespective of whether single or multiple users logged in to QuickBooks. Also, the orders queued by our app will get synced to QuickBooks, upon the response received from the web connector. Web connector is a tool provided by QuickBooks. Please check the below-integrated application preference screenshot from QuickBooks. If the settings are as per the below mentioned for our application in QuickBooks preference, then even if you are logged into multi-user mode the web connector will run fine and will sync the orders queued by our app.