(Xojo Plugin) Office365 IMAP with OAuth2 Authentication

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

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// 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.
Dim jsonToken As New Chilkat.JsonObject
Dim success As Boolean
success = jsonToken.LoadFile("qa_data/tokens/office365.json")
If (success = False) Then
    System.DebugLog("Failed to open the office365 OAuth JSON file.")
    Return
End If

Dim imap As New Chilkat.Imap

imap.Ssl = True
imap.Port = 993

// Connect to the Office365 IMAP server.
success = imap.Connect("outlook.office365.com")
If (success <> True) Then
    System.DebugLog(imap.LastErrorText)
    Return
End If

// 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",jsonToken.StringOf("access_token"))
If (success <> True) Then
    System.DebugLog(imap.LastErrorText)
    Return
End If

System.DebugLog("O365 OAuth authentication is successful.")

// Do something...
success = imap.SelectMailbox("Inbox")
If (success <> True) Then
    System.DebugLog(imap.LastErrorText)
    Return
End If

// 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()

System.DebugLog("Finished.")