Please follow the below steps to check out all Visitors in bulk:
Login to ADDA -->> Admin -->> ADDA Gatekeeper -->> Usage Summary -->> Go to Daily Visitor-In and then click on "Check-Out".
Select the Radio Button for "Visitor" —>> Use "Checkout All Visitors" to check out all Visitors, including those who checked in today, and "Checkout All Visitors Except Today's" to check out all Visitors except those who checked in today.