I see many of these post all over google and none with any luck of solutions, so I may be shooting in the dark. Any assistance is much appreciated in advance.
I have several VMs from different 2012 R2 hosts being backed up with DPM 2012 R2. The VMs are Win 2008 R2.
Most of the VMs allow you to dig into the VHDx files without issue. A few of them give DPM Error ID 958 (0x80990F4E).