Is it possible to do a multiple-records data merge that doesn't generate multiple text boxes? And if so, how?
For publications such as a directory with contact information, it would be easier to manage the layout by merging multiple records into one text box. However, it seems like the only option in InDesign is to merge the records into each of their own text boxes.
No, but it's possible to stitch the frames together after the merge, then reflow. See Adobe Community: Multiple record data merge into paragraph styles-applies the wrong style