I'm working on an application that reads and updates Contacts from Office 365 through Azure Graph API. Reading and deleting works fine, however, when I try to update a contact I receive a Bad Request error with the following message:
Unable to update the specified properties for objects that have originated within an external service.
Don't have a clue what they mean with external service? It doesn't matter if the contact is created through Admin UI or through PowerShell.
Can you please let me know if I am missing something here?