Step 1: Login to www.mydbsync.com Click on My Account ?? Customer Login

Step 2: Enter your DBSync username and password. Click on Sign In

Step 3: After logging in you would see the DBSync Home page. Click on the Development Studio button.

Step 4: Click on the project name or edit button.

Step 5: Click on the Connectors section on the left tab.

Step 6: Click on QuickBooksOnline or edit button

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Step 7: Keep logged in to your QB Online instance in the same window.

Note: Connect to the same instance of QuickBooks online which was connected previously. 

Step 8: After clicking on QuickBooksOnline or edit button then click on “Would you like to re-connect?”

Step 9: Then select the environment as required ( normally it would be Production/Developer Instance) and click on “Connect to QuickBooks” button

Step 10: Click on the “Connect” button at the bottom right corner of the pop-up. You shall get connected the QB Online instance that is opened in the same window.

Step 11: Then click on Advanced properties. Then save and validate the connection by clicking on the “Validate Connection” button.