How does Qbdbmgrn work?
The Qbdbmgrn tool helps you track performance within a SQL Server database. A backup tool known as Qbdbmgrn allows you to manage your backups and restore them on a separate machine. Manual and automatic backups are supported. In addition to QAStatus, which is open source software as well, it was made by the same person. Neither Windows XP nor Vista is compatible with this program. QuickBooks Desktop products from Intuit include a program called Qbdbmgrn. Using this program you can update customer information and delete it. For important work such as this, you can store customer data on the computer's hard drive so you aren't dependent on your main system.
https://quickbookstoolhub.com/qbdbmgrn-not-running-on-the-system/
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Allen Smith commented
QuickBooks database manager service is not running. There can be multiple reasons for this. There is a detailed troubleshooting guide for this. Please check it out here.
https://qbtechs.com/qbdbmgrn-not-running-on-this-computer/