Walk-up: Unable to Book Appointment Slot for Multiple Users – "Opened for value is invalid" Error
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04-28-2025 07:22 AM
Hello everyone,
I’m working on a walk-up setup in ServiceNow and facing an issue with booking appointments for multiple users.
Here’s the situation:
The Contact field is a list collector allowing me to select multiple users.
When I select only one user, the available appointment slots display correctly, and I can proceed with the booking.
However, when I select more than one user (for example, 12 employees), the schedule becomes empty, and the following error message appears:
"Opened for value is invalid. Please try again or contact customer support."
To adapt to this scenario, I have already updated the Appointments per window field in the sn_apptmnt_booking_service_config table to 12, but the problem persists.
Has anyone encountered a similar issue?
Is there any additional configuration I’m missing to allow booking one appointment slot for multiple users at once?
Any guidance or ideas would be greatly appreciated!
Thanks a lot in advance