To reconnect your Floranext and Quickbooks Online accounts after the OAuth 2.0 update please follow the steps below:
1. Login to Quickbooks
Follow this link to login to Quickbooks Online.
2. Log into Floranext. Navigate to Settings > Quickbooks > Export.
3. Click the blue CHECK CONNECTION button at the top right of the page.
4. After being redirected to Quickbooks Online, select your business, hit NEXT, then hit CONNECT.