(VBScript) Office365 OAuth2 Resource Owner Password Credentials Grant for SMTP, IMAP, POP

Demonstrates how to get an OAuth2 access token for use with Office 365 in the SMTP, IMAP, and POP3 protocols using the resource owner password credentials grant.

This is a way of getting an OAuth2 access token for the O365 account you own, WITHOUT needing to grant access interactively via a browser.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

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

' Get an OAuth2 access token by sending a POST like this:

' 	POST {tenant}/oauth2/v2.0/token
' 	Host: login.microsoftonline.com
' 	Content-Type: application/x-www-form-urlencoded
' 
' 	client_id=6731de76-14a6-49ae-97bc-6eba6914391e
' 	&client_secret=*****************
' 	&scope=user.read%20openid%20profile%20offline_access
' 	&username=MyUsername@myTenant.com
' 	&password=SuperS3cret
' 	&grant_type=password

set http = CreateObject("Chilkat.Http")

set req = CreateObject("Chilkat.HttpRequest")
req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

' Use the application ID for the client_id.
' (In Azure App Registrations, use the Application (client) ID)
req.AddParam "client_id","CLIENT_ID"
req.AddParam "client_secret","CLIENT_SECRET"

req.AddParam "scope","openid profile offline_access https://outlook.office365.com/SMTP.Send https://outlook.office365.com/POP.AccessAsUser.All https://outlook.office365.com/IMAP.AccessAsUser.All"
req.AddParam "username","my_email_address"
req.AddParam "password","my_email_password"
req.AddParam "grant_type","password"

' Replace "{tenant}" with your tenant ID, such as "112d7ed6-71bf-4eba-a866-738364321bfc".req.HttpVerb = "POST";
set resp = CreateObject("Chilkat.HttpResponse")
success = http.HttpReq("https://login.microsoftonline.com/{tenant}/oauth2/v2.0/token",req,resp)
If (success = 0) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

statusCode = resp.StatusCode
outFile.WriteLine("response status code: " & statusCode)
outFile.WriteLine("response body:")
outFile.WriteLine(resp.BodyStr)

' The successful JSON response looks like this:

' 
' {
'   "token_type": "Bearer",
'   "scope": "https://outlook.office365.com/IMAP.AccessAsUser.All https://outlook.office365.com/POP.AccessAsUser.All https://outlook.office365.com/SMTP.Send",
'   "expires_in": 3599,
'   "ext_expires_in": 3599,
'   "access_token": "eyJ0eX ... 62Nyw",
'   "refresh_token": "0.AAAA1n4t ... tNxyA",
'   "id_token": "eyJ0eXA ... qdIGyOYw"
' }

' Save the JSON to a file for future requests.
If (statusCode = 200) Then
    set fac = CreateObject("Chilkat.FileAccess")
    success = fac.WriteEntireTextFile("qa_data/tokens/office365.json",resp.BodyStr,"utf-8",0)
End If


outFile.Close