I have 3 SM-T587P tablets that were used at my company but are no longer used by the technicians (they are no longer working here) and need to bypass the FRP. Do you know if this still works??Had the same issue on my SM-T587P. Nothing worked. What finally worked was the following:
(1) Flash a "combination rom" using Odin3 (google "Combination Rom For GALAXY TAB A 10.1 2016 SPRINT SM-T587P" - I used the one on Talfish).
(2) Reset to factory settings from within the rom.
(3) Flash the original firmware.
Voila! The tablet booted up with FRP removed. (Hopefully I didn't forget any steps. I used a couple of YouTube videos to learn how to flash using Odin3.)