Using classic Outlook for Windows in business environments
Hi Mya,
Please try to check if the org settings are properly configured by going to Microsoft 365 admin center:
Go to Settings > org settings > bookings > ensure booking is turned on for your organization
Then double check as well the shared booking controls
Go to Settings > Org settings > Bookings > Shared Bookings/Granular controls > look for a setting called "blocked shared bookings from outside your organization > if its enabled, people outside your tenant cannot access the booking page.
Note: Changes to tenant settings may take up to four hours to apply.
For more information, you can check this link: https://learn.microsoft.com/en-us/microsoft-365/bookings/granular-controls-shared-bookings?view=o365-worldwide&utm_source=chatgpt.com