(PowerShell) Office365 IMAP with OAuth2 Authentication

See more Office365 Examples

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

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# 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.
$jsonToken = New-Object Chilkat.JsonObject
$success = $jsonToken.LoadFile("qa_data/tokens/office365.json")
if ($success -eq $false) {
    $("Failed to open the office365 OAuth JSON file.")
    exit
}

$imap = New-Object Chilkat.Imap

$imap.Ssl = $true
$imap.Port = 993

# Connect to the Office365 IMAP server.
$success = $imap.Connect("outlook.office365.com")
if ($success -ne $true) {
    $($imap.LastErrorText)
    exit
}

# 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 -ne $true) {
    $($imap.LastErrorText)
    exit
}

$("O365 OAuth authentication is successful.")

# Do something...
$success = $imap.SelectMailbox("Inbox")
if ($success -ne $true) {
    $($imap.LastErrorText)
    exit
}

# 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()

$("Finished.")