In Magnetiq you can change the Status of multiple attendees inside an event, without having to do it manually one by one.
Just click on the button "Add / Edit" on bottom right of the guest list, then click on the "Edit Multiple Attendees" option.
A pop-up window will appear where you will be able to filter and select a specific segment of attendees that you want to update.
Once you've selected the attendees on the left, just choose the desired option on the right, among:
Invitation Status
Access Status
Special Pass
Finally, click on the blue button Update.
Done. All the selected attendees will be updated with their new status.