Dear EndNote developers,
since 2008 there are requests to merge references. Now in 2017 this issue is still not addressed.
There are companies purchasing this product with 100s of licenses and 1000s of records that simply cannot handle manually the existing duplicates find feature.
The merging functionality should cover importing from text and other EndNote library, as well as through the duplicates find function. There should be options to free select the match criteria (apart from the standard author, title, year) and also options to select either to only merge to empty field or also to overwrite existing (but different).