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Mail.ReadBasic.All

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Application Read All Resources

Allows the app to read basic mail properties in all mailboxes without a signed-in user. Includes all properties except body, previewBody, attachments and any extended properties.

Delegated Access App-Only Access

Permission Details

Application Permission

Read basic mail in all mailboxes

Allows the app to read basic mail properties in all mailboxes without a signed-in user. Includes all properties except body, previewBody, attachments and any extended properties.

Properties

Property Type Description
id string The unique identifier for an entity. Read-only.
deliveryStatus microsoft.graph.messageStatus
events microsoft.graph.messageEvent collection
recipientEmail string

Relationships

Relationship Type Description
attachments attachment collection The fileAttachment and itemAttachment attachments for the message.
extensions extension collection The collection of open extensions defined for the message. Nullable.
singleValueExtendedProperties singleValueExtendedProperties collection The collection of single-value extended properties defined for the message. Nullable.
multiValueExtendedProperties multiValueExtendedProperties collection The collection of multi-value extended properties defined for the message. Nullable.

Graph Methods

Delegated access App-only access
Methods
GET /me/mailFolders
GET /me/mailFolders/{id}
GET /me/mailFolders/{id}/childFolders
GET /me/mailFolders/{id}/messages
GET /me/mailFolders/{id}/messages/{id}
GET /me/mailFolders/{id}/messages/delta
GET /me/mailFolders/delta
GET /me/messages
GET /me/messages/{id}
GET /users/{id | userPrincipalName}/mailFolders
GET /users/{id | userPrincipalName}/mailFolders/{id}
GET /users/{id | userPrincipalName}/mailFolders/{id}/childFolders
GET /users/{id | userPrincipalName}/mailFolders/{id}/messages
GET /users/{id | userPrincipalName}/mailFolders/{id}/messages/{id}
GET /users/{id | userPrincipalName}/messages
GET /users/{id | userPrincipalName}/messages/{id}
GET /users/{id}/mailFolders/{id}/messages/delta
GET /users/{id}/mailFolders/delta
Methods
GET /me/mailFolders
GET /me/mailFolders/{id}
GET /me/mailFolders/{id}/childFolders
GET /me/mailFolders/{id}/messages
GET /me/mailFolders/{id}/messages/{id}
GET /me/mailFolders/{id}/messages/delta
GET /me/mailFolders/delta
GET /me/messages
GET /me/messages/{id}
GET /users/{id | userPrincipalName}/mailFolders
GET /users/{id | userPrincipalName}/mailFolders/{id}
GET /users/{id | userPrincipalName}/mailFolders/{id}/childFolders
GET /users/{id | userPrincipalName}/mailFolders/{id}/messages
GET /users/{id | userPrincipalName}/mailFolders/{id}/messages/{id}
GET /users/{id | userPrincipalName}/messages
GET /users/{id | userPrincipalName}/messages/{id}
GET /users/{id}/mailFolders/{id}/messages/delta
GET /users/{id}/mailFolders/delta

Code Examples

C# / .NET SDK
// Install: dotnet add package Microsoft.Graph
// Install: dotnet add package Azure.Identity
using Microsoft.Graph;
using Azure.Identity;



// Application permissions - daemon/service app
var tenantId = "YOUR_TENANT_ID";
var clientId = "YOUR_CLIENT_ID";
var clientSecret = "YOUR_CLIENT_SECRET";

var credential = new ClientSecretCredential(tenantId, clientId, clientSecret);
var graphClient = new GraphServiceClient(credential);

// Example: GET /users/{user-id}
var users = await graphClient.Users.GetAsync();
foreach (var user in users?.Value ?? [])
{
    Console.WriteLine($"User: {user.DisplayName}");
}
JavaScript / TypeScript
// npm install @azure/msal-browser @microsoft/microsoft-graph-client
import { PublicClientApplication } from "@azure/msal-browser";
import { Client } from "@microsoft/microsoft-graph-client";
import { AuthCodeMSALBrowserAuthenticationProvider } from 
    "@microsoft/microsoft-graph-client/authProviders/authCodeMsalBrowser";

const msalConfig = {
    auth: {
        clientId: "YOUR_CLIENT_ID",
        authority: "https://login.microsoftonline.com/YOUR_TENANT_ID"
    }
};

const pca = new PublicClientApplication(msalConfig);
await pca.initialize();



// Application: Use client credentials (Node.js backend only)
// npm install @azure/identity @microsoft/microsoft-graph-client
import { ClientSecretCredential } from "@azure/identity";
import { TokenCredentialAuthenticationProvider } from 
    "@microsoft/microsoft-graph-client/authProviders/azureTokenCredentials";

const credential = new ClientSecretCredential(
    "YOUR_TENANT_ID",
    "YOUR_CLIENT_ID", 
    "YOUR_CLIENT_SECRET"
);

const authProvider = new TokenCredentialAuthenticationProvider(credential, {
    scopes: ["https://graph.microsoft.com/.default"]
});

const graphClient = Client.initWithMiddleware({ authProvider });
const result = await graphClient.api("/users").get();
console.log(result);
PowerShell
# Install Microsoft Graph PowerShell module
Install-Module Microsoft.Graph -Scope CurrentUser



# Application access with certificate
$params = @{
    ClientId = "YOUR_CLIENT_ID"
    TenantId = "YOUR_TENANT_ID"
    CertificateThumbprint = "YOUR_CERT_THUMBPRINT"
}
Connect-MgGraph @params

# Or with client secret (not recommended for production)
# Connect-MgGraph -ClientSecretCredential $credential

# Example: GET /users
$result = Invoke-MgGraphRequest -Method GET -Uri "https://graph.microsoft.com/v1.0/users"
$result | ConvertTo-Json -Depth 5

# Always disconnect when done
Disconnect-MgGraph
Python
# pip install msgraph-sdk azure-identity
from azure.identity import InteractiveBrowserCredential, ClientSecretCredential
from msgraph import GraphServiceClient
import asyncio



# Application permissions - client credentials
credential = ClientSecretCredential(
    tenant_id="YOUR_TENANT_ID",
    client_id="YOUR_CLIENT_ID",
    client_secret="YOUR_CLIENT_SECRET"
)
scopes = ["https://graph.microsoft.com/.default"]
client = GraphServiceClient(credential, scopes)

async def get_users():
    # Example: GET /users
    result = await client.users.get()
    for user in result.value:
        print(f"User: {user.display_name}")
    return result

asyncio.run(get_users())

App Registration

1

Navigate to Azure Portal

Go to App registrations in Microsoft Entra admin center

2

Add API Permission

Select your app → API permissions → Add a permission → Microsoft Graph

3

Select Permission Type

Choose Application permissions and search for Mail.ReadBasic.All

4

Grant Admin Consent

Application permissions always require admin consent. Click "Grant admin consent" in the Azure portal.