When working with pictures, it’s very easy to be overloaded by the amount of data. Bulk Rename Utility is an easy way to manage file names, dates, and other such data, especially with pictures imported using older programs. But there is one problem with BRU: sometimes the date taken field does not work, and file names may end up with slightly different dates.
The key to fixing this is to 1) enable Administrator mode in BRU, and 2) click on Options>Extract>EXIF data (photos).
Both of these settings are disabled by default for security and to for speed, but it can cause some problems. Credits for the fix to BRU forums.