Create folder in user mailbox with Graph API

Question

want to use the Graph API to create a folder in a user's mailbox that exists in Exchange Online. As a result of the investigation, if I use "https://graph.microsoft.com/v1.0/users/[email protected]/mailFolders", I feel that it is possible, but an error is displayed and I cannot create it. Currently, "Exchange> Mail.ReadWrite, MailboxSettings.ReadWrite" is assigned to the execution user (admin). However, it says "Access is denied. Check credentials and try again." Is the permission wrong? Or is the specified URL incorrect? Sorry to trouble you, but thank you for your response.

【Append】

$body = @{
    grant_type="client_credentials"
    resource=$resource
    client_id=$ClientID
    client_secret=$ClientSecret
}
`#Get Token
$oauth = Invoke-RestMethod -Method Post -Uri $loginURL/$TenantName/oauth2/token -Body $body

API Permissions

Please show the screenshot of the API permissions of your app registration, and how did you get the access token and call the api? — Joy Wang
– Joy Wang, Commented Apr 14, 2020 at 5:36
Please also update the question with the way you used to get the token. — Joy Wang
– Joy Wang, Commented Apr 14, 2020 at 7:06
Thank you very much. I was able to execute normally with the contents you received. I would like to know the command required to actually create a folder using the Graph API in PowerShell, should it be listed as another question? I got the token with the previous method and created it with the following command. However, no error was displayed with "StatusCode = 200", but the folder was not created. I apologize for all the questions, but I would appreciate it if you could confirm. — RTO24
– RTO24, Commented Apr 14, 2020 at 8:59

Joy Wang · Accepted Answer · 2020-04-14 09:53:39Z

1

You are using the client credential flow to get the token to call Microsoft Graph - Create MailFolder, so you need to add the Application permission Mail.ReadWrite of Micrsoft Graph to your AD App.

1.Add the Application permission Mail.ReadWrite like below.

2.Click the Grant admin consent for xxx button, and make sure the $resource in your request is https://graph.microsoft.com.

Update:

Here is a powershell sample to call Create MailFolder API to create MailFolder.

$uri = "https://graph.microsoft.com/v1.0/users/[email protected]/mailFolders"
$headers = @{
    'Content-Type' = 'application/json'
    'Authorization' = 'Bearer <access-token-here>'
}
$body = ConvertTo-Json @{
    "displayName" = "testfolder1"
}
Invoke-RestMethod -Method Post -Uri $uri -Headers $headers -Body $body

Check the result in the Graph Explorer with List mailFolders:

edited Apr 14, 2020 at 9:53

answered Apr 14, 2020 at 7:51

Joy Wang

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