Create mailbox folder with Graph API

Question

I want to use the Graph API to create a folder in a mailbox that belongs to Exchange Online.
After getting the token, I was able to create a folder with the following command.
However, it cannot be created as a child folder of the specified folder.
Is it possible to create directly under the inbox?

$url = "https://graph.microsoft.com/v1.0/users/testuser01@keyman .com/mailFolders/inbox"
$Body = @"
{
"displayName": "TestFolder",
"parentFolderId": "**********"
}
"@

Invoke-RestMethod -Uri $url -Method Post -Body $Body -ContentType 'application/json; charset=utf-8' -Headers $headerParams | ConvertTo-Json

Answer 1

@ort_tt , I just tested this api and it worked for me. Let me share the detailed steps below:

1. Use Authorization Code Grant Flow to fetch a token for your App from AAD.
2. Once you have the code use it to request for an access_token from AAD. make sure the following delegated permission "Mail.ReadWrite" is present on the app registration that is being used here.
3. Call the following Graph API.

API: https://graph.microsoft.com/v1.0/userPrincipalName/mailFolders/{id}/childFolders

Eg:
https://graph.microsoft.com/v1.0/me/mailFolders/AAMkADAwZmE5NGU1LWJlYzAtNGE0ZS1hZDI4LWZmNmU0MDdjNzgyZQAuAAAAAABh0v7KYQaiRob9eDRfUq1JAQDBRn5LIsmdTKmOCwZeGkgvAAAAAAEMAAA=/childFolders

Body:
{
"displayName": "{Child Folder Name}",
}

This is the ID for my inbox "AAMkADAwZmE5NGU1LWJlYzAtNGE0ZS1hZDI4LWZmNmU0MDdjNzgyZQAuAAAAAABh0v7KYQaiRob9eDRfUq1JAQDBRn5LIsmdTKmOCwZeGkgvAAAAAAEMAAA="

Once you make the api call, you should get status 200 OK and the child folder should be present in your outlook:

Hope this helps.

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