Please feel free to request appropriate enhancements by email to IDM support as it has no effect just posting such ideas for new features in user-to-user forum.
Another solution would be the method my favorite file manager Total Commander uses when errors occur on copying or deleting files because of a permission or sharing access problem.
Every file/directory operation (copying/moving/renaming/deleting) failing is added to a queue and actual task is continued until last file/directory being processed. Then Total Commander informs the user about the failed operations and asks what to do: retry, retry after elevation to administrator, retry using a different account, ignore (depends on failed operation), ...
This behavior makes it possible to synchronize large directory trees, copy or delete large directory trees without any user interaction while process is running as much as possible up to the end. Then the user is informed about not done file/directory operations because of various reasons if there were any at all and the user can decide what to do regarding failed operations.
Best regards from an UC/UE/UES for Windows user from Austria