Problem sending Mail via smtp-mail.outlook.com / OAUTH2 as SMTP or JSON

Hi,

I do have the problem to send mails to outlook after getting the new OAUTH2 token. 

 I have no problem getting the token, but after I got the token I try to send the mail thru smtp but authorization failed , please see my try to send the token thru the %Net.Authenticator mechanism %Net.SASL.XOAUTH2

Is this ok?

Or is there an other method to authenticate using the needed bearer method instead of user/pwd with the authenticator? 

 ....code to get the token is working..

...   set s=##class(%Net.SMTP).%New()
    
    set m=##class(%Net.MailMessage).%New()
    
    set auth=##class(%Net.Authenticator).%New() 
    set auth.UserName="user@..."
    
    set meth=##class(%Net.SASL.XOAUTH2).%New()
    set meth.MechanismName="XOAUTH2"
    set meth.AccessToken=".....the token i got from Microsoft....sadfsafasdfasdfasdfasdfsdfs...."
    
    set auth.Mechanism=meth
    set auth.ServiceName="smtp"
    
    set s.authenticator=auth
    set s.port=587
    set s.SSLConfiguration="ISC.FeatureTracker.SSL.Config"
    set s.UseSTARTTLS=1

           
    set m.Subject=SUBJECT                     
    set m.Charset="iso-8859-1"
    set m.IsHTML=1
    ...etc all other smtp properties....