SharePoint backup is failing on some resources but working on others.
Completed status: Failed
Final error: 0xe0009b73 - The logon account that was provided is not a member of the Administrators group. Verify that the data that you selected was backed up. Additional privileges may be required to access the data on the Windows computer.
Final error category: Security Errors
For additional information regarding this error refer to link V-79-57344-39795
This can occur if the resource credentials list for SharePoint is not expanded to include sub resources which are using different credentials which do not have the rights to backup SharePoint.
Expand all the resources in the test\edit credentials list and make sure they are all using the required account.