QuickBooks Sync Manager not Working refers to a problem where the Sync Manager feature fails to synchronize data between QuickBooks Desktop and other connected applications or services. This issue can occur due a various reasons, such an outdated Sync Manager, connectivity issues, or conflicts with third-party applications. Resolving the problem involves updating QuickBooks, resetting Sync Manager, and ensuring proper network configuration and permissions or call us at 1.855.738.2784 to get direct assistance from our support team.