Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Pierre Sicallac**,**
Good day! Thank you for reaching out to Microsoft community.
As per your description, it seems like that you are using the Microsoft Graph API to retrieve customer booking data from Microsoft Bookings. Also, the customers field is empty for some appointments, even though all appointments were configured the same way and anonymization settings were not applied.
However, there is another specific channel for your mentioned concern where you will get some possible information for certain specific resources and platform from our related community members.
I understand your concern but since your problem is related to Microsoft Graph API & Bookings, I would also like to suggest you post your concern in the related community i.e., Ask a question - to below mentioned communities to get detailed help from experts.
Apologies for redirecting you to different community as the members in the category posted focus on the users with out of the box concerns on Microsoft 365 exchange online and have limited knowledge on the MS Bookings & API; so, to get the fast and better assistance, we have redirected you in the correct path.
Appreciate your patience and understanding. Have a great day!!
Best Regards,
S M Nazmun Nur