An error comes up when trying to register a ntds.dit from unpacked backups:
"Error occurred while opening database.
Details: Secondary index is corrupt. The database must be defragmented"
This error only occurs if RMAD 8.2 is installed on OS version that is different from OS versions of the DC. For example RMAD 8.2 is on 2003 and DC is 2008 R2. And vise versa.
This is a defect (TF00227088) and is planned to be fixed in a future version of RMAD.