If you encounter the following error message while trying to backup the internal database (IDB):

Error

Putting the Internal Database into the backup mode failed.

The reason might be due to the backup being initiated by the Inet process which may run as a certain user account that has not been added to the impersonation of the cell manager.

To resolve, follow these steps:

1. Start the DP GUI. Choose "Clients"
2. Right-click the cell manager, delete the existing impersonation.
3. Add a new impersonation and enter the correct credentials (usually the service account).