Most contributions to a bulletin board
Who
EXSO Consultancy
What
4900 total number
Where
Saudi Arabia (Al Riyadh)
When

The most contributions to a bulletin board is 4,900 participants, and was achieved by EXSO Consultancy (Saudi Arabia) during Ata's event, in Riyadh, Saudi Arabia, on 5 December 2017.

The event happened for volunteering purposes.