Graph API - List Users with mailboxSettings

Question

Hello,

I'm trying to list users mailboxSettings using the Graph API.

The following request (without mailboxSettings) works : https://graph.microsoft.com/beta/users?$select=id, but the one with mailboxSettings fails : https://graph.microsoft.com/beta/users?$select=id,mailboxSettings with the error :

   {  
       "error": {  
           "code": "ExplicitTargetMailboxIdShouldNotBeNullOrWhiteSpace",  
           "message": "The Id is invalid.",  
           "innerError": {  
               "date": "2022-12-19T13:05:51",  
               "request-id": "6cf5161c-13da-401c-850e-0149376aaeea",  
               "client-request-id": "1dd1d236-5f16-c3b7-839a-484687d3332b"  
           }  
       }  
   }  

Any ideas?
Thanks in advance!

Quentin

Answer 1

Hello @Quentin DREYER ,

As per documentation user-mailboxSettings can be used only for the primary mailbox of the signed-in user. You can get or update settings.

GET /users/{id}?$select=id,mailboxSettings  

Hope this helps.
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Answer 2

You can only query mailboxSettings one user at a time, afaik. So this would work:

GET https://graph.microsoft.com/beta/users/{userId}?$select=id,mailboxSettings  

Answer 3

Hi @Quentin DREYER , the error "The mailbox is either inactive, soft-deleted, or is hosted on-premise" may occur because the user you are accessing (the user referred to by the user-id) lacks a valid M365 license. So please check if the user is assigned the license first. And to read the mailboxsetting, you need to add MailboxSettings.Read permission. Hope can help you. Best Wishes.

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