(Objective-C) Office365 IMAP with OAuth2 Authentication

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Demonstrates how to authenticate using OAuth2 with outlook.office365.com.

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#import <CkoJsonObject.h>
#import <CkoImap.h>

// An Office365 OAuth2 access token must first be obtained prior
// to running this code.

// Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
// interactive authorizaition via a web browser.  Afterwards, the access token
// can be repeatedly refreshed automatically.

// See the following examples for getting and refreshing an OAuth2 access token

// Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
// Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

// First get our previously obtained OAuth2 access token.
CkoJsonObject *jsonToken = [[CkoJsonObject alloc] init];
BOOL success = [jsonToken LoadFile: @"qa_data/tokens/office365.json"];
if (success == NO) {
    NSLog(@"%@",@"Failed to open the office365 OAuth JSON file.");
    return;
}

CkoImap *imap = [[CkoImap alloc] init];

imap.Ssl = YES;
imap.Port = [NSNumber numberWithInt:993];

// Connect to the Office365 IMAP server.
success = [imap Connect: @"outlook.office365.com"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Use OAuth2 authentication.
imap.AuthMethod = @"XOAUTH2";

// Login using our username (i.e. email address) and the access token for the password.
success = [imap Login: @"OFFICE365_EMAIL_ADDRESS" password: [jsonToken StringOf: @"access_token"]];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

NSLog(@"%@",@"O365 OAuth authentication is successful.");

// Do something...
success = [imap SelectMailbox: @"Inbox"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Your application can continue to do other things in the IMAP session....

// When finished, logout and close the connection.
success = [imap Logout];
success = [imap Disconnect];

NSLog(@"%@",@"Finished.");