Error access denied while using /users/<userid>/mailFolders api

Question

Hi,

I'm using Graph explorer to get mailfolders of my users. I'm constantly seeing this below error message for every other user.

{
"error": {
"code": "ErrorAccessDenied",
"message": "Access is denied. Check credentials and try again.",

Please help me settle this issue. Really appreciate any help!!

Answer 1

Hi @CheeryB

Thanks for reaching out!

You are getting this error because you are using Graph Explorer tool to test GET /users/{id | userPrincipalName}/mailFolders endpoint.

Graph Explorer can only work with Delegated Permissions i.e., GET /me/mailFolders

To check other users' mailfolders, you need to add Application Permissions ( Mail.ReadBasic.All, Mail.Read, Mail.ReadWrite ) in your Azure application, generate an application token and then test this GET /users/{id | userPrincipalName}/mailFolders endpoint in Postman Tool.

Refer- List Mail Folders

Hope this helps.

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