Objective-C
Outlook -- List Mail Folders

Uses the Microsoft Graph API to list Outlook mail folders.
Note: This example requires Chilkat v9.5.0.67 or greater.
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Objective-C
#import <CkoHttp.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>

BOOL success = NO;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

CkoHttp *http = [[CkoHttp alloc] init];

//  Use your previously obtained access token here:
//  See the following examples for getting an access token:
//     Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
//     Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
//     Refresh Access Token (Azure AD v2.0 Endpoint).
//     Refresh Access Token (Azure AD Endpoint).

http.AuthToken = @"MICROSOFT_GRAPH_ACCESS_TOKEN";

CkoStringBuilder *sbResponse = [[CkoStringBuilder alloc] init];

//  Sends:  GET /users/{id | userPrincipalName}/mailFolders
//  Note: It is also possible to use the literal string "me" for the current logged-on user.
//  For example: GET /me/mailFolders
[http ClearUrlVars];
[http SetUrlVar: @"userPrincipalName" value: @"chilkatsoft@outlook.com"];
success = [http QuickGetSb: @"https://graph.microsoft.com/v1.0/users/{$userPrincipalName}/mailFolders" sbContent: sbResponse];
if ((success != YES) && ([http.LastStatus intValue] == 0)) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json LoadSb: sbResponse];
json.EmitCompact = NO;

NSLog(@"%@%d",@"Status code = ",[http.LastStatus intValue]);
if ([http.LastStatus intValue] != 200) {
    NSLog(@"%@",[json Emit]);
    NSLog(@"%@",@"Failed.");
}

NSLog(@"%@",[json Emit]);
NSLog(@"%@",@"----");

//  In my test case, this is the result (see below)
//  Apparently, this lists folders without listing subfolders (aka child folders)
//  There's another REST API call to list child folders.

//  To iterate over the folders:
int i = 0;
int numFolders = [[json SizeOfArray: @"value"] intValue];
while (i < numFolders) {
    json.I = [NSNumber numberWithInt: i];
    NSLog(@"%@",[json StringOf: @"value[i].displayName"]);
    i = i + 1;
}

//  The output from the above loop:

//  	Archive
//  	Deleted Items
//  	Drafts
//  	Inbox
//  	Junk Email
//  	Outbox
//  	Sent Items

//  ------------------------------------------------------------------------------------
//  The raw JSON response: 

//  {
//    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('chilkatsoft%40outlook.com')/mailFolders",
//    "value": [
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAG8XunwAAAA=",
//        "displayName": "Archive",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 0,
//        "unreadItemCount": 0,
//        "totalItemCount": 0
//      },
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEKAAAA",
//        "displayName": "Deleted Items",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 0,
//        "unreadItemCount": 0,
//        "totalItemCount": 0
//      },
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA",
//        "displayName": "Drafts",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 0,
//        "unreadItemCount": 0,
//        "totalItemCount": 0
//      },
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA",
//        "displayName": "Inbox",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 2,
//        "unreadItemCount": 0,
//        "totalItemCount": 4
//      },
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEiAAAA",
//        "displayName": "Junk Email",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 0,
//        "unreadItemCount": 0,
//        "totalItemCount": 0
//      },
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgELAAAA",
//        "displayName": "Outbox",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 0,
//        "unreadItemCount": 0,
//        "totalItemCount": 0
//      },
//      {
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEJAAAA",
//        "displayName": "Sent Items",
//        "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
//        "childFolderCount": 0,
//        "unreadItemCount": 0,
//        "totalItemCount": 14
//      }
//    ]
//  }
//  

//  ------------------------------------------------------------------------------------------------------
//  This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com
//  
//  The Microsoft Graph Outlook Mail API lets you read, create, and send messages and attachments, 
//  view and respond to event messages, and manage folders that are secured by Azure Active Directory 
//  in Office 365. It also provides the same functionality in Microsoft accounts specifically 
//  in these domains: Hotmail.com, Live.com, MSN.com, Outlook.com, and Passport.com.