How to add an OrgContact

[D8planet]

Basically i was trying to create a simple app in C# to sync user contacts so that they can be seen in the Default Global Address List (GAL), and found myself using graph.

When i use await graphClient.Contacts.PostAsync(OrgContact newContact);
the error Unsupported resource type 'OrgContact' for operation 'Create'. pops up.

I am new to C# programming, so it could very well be my fault but everything else works (getting the full contact list works and i can connect to the Exchange Online Server).

I have seen that i could create a new user with a mailbox, but it would defeat the purpose of having contacts, i just want them to be visible in the GAL.
I just wanted to have some clarifications because i'm lost; also if there's a better approach i'm open to suggestions.
Thanks in advance

[D8planet]

Some more context if needed: the idea is to take all contacts from my personal Contacts folder (that i can see in Outlook for example) and make those contacts visible in the GAL of my organization.
I know that i can create a contact from the Exchange admin center but i wanted to add them dynamically and make the process automatic, like maybe sync them once a week.

[andrueastman]

Thanks for raising this @D8planet

According to the rest Api documentation, the organizational contact is managed by the admin and an operation to create on via the APImay not be supported at the moment.
https://learn.microsoft.com/en-us/graph/api/resources/orgcontact?view=graph-rest-1.0

[D8planet]

Thanks for the quick reply!
Guess i'll have to search a bit more, assuming there is a way to do what i want (i am still kind of lost ngl)