Shared Mailbox handling with Microsoft Graph

Question

Hello

I want to access a shared mailbox with Microsoft Graph. I am currently trying to get a response with Graph Explorer. What I found so far to access a shared mailbox is the following GET request: "https://graph.microsoft.com/v1.0/users/{sharedmailboxmailaddress}/messages" as a respond I get:

{
"error": {
"code": "ErrorAccessDenied",
"message": "Access is denied. Check credentials and try again.",
"innerError": {
"date": "2020-08-28T08:39:00",
"request-id": "ba9bddb6-601e-4d37-a787-3e2e474ce72b"
}
}
}

My user has full access to this shared mailbox - e.g. I can read/write the mailbox in Outlook.
To consent the permission (modify permissions) is not an option because I am not an admin of the organization - I think I would need the permission "Mail.ReadWrite.Shared".

Is there a way without consenting the permission because my user has full access to the shared mailbox?

I am looking forward to read an answer :)

Answer 1

@PascalBurkanrd-5033 You need to add and consent to required permissions for the user on Graph Explorer page by selecting the permissions from "Settings Gear" on left side -

Select Mail.Read.Shared from the list of permissions and consent it by accepting it as it requires an user consent.

You will then get redirected to the consent page as shown below -

Once consented you can then access the shared mailbox by calling -
https://graph.microsoft.com/v1.0/users/{sharedmailboxmailaddress}/messages

Answer 2

Can I use Graph to obtain a list of Shared Mailboxes that I have permission to access? Or is this still only available via PowerShell?