When trying to do an initial copy the drive on a target said access denied – permission removed
Application log in the Event Viewer reports Event ID 8194
Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied.
This is often caused by incorrect security settings in either the writer or requestor process.

This issue relates to permissions in Windows Component Services. We would recommend reaching out to Microsoft directly for assistance related to the Windows Component Object Model and the related permissions.
As a courtesy, you may find the following TechNet social post as a useful starting point:
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