Hello,

I registered new web-application in "Microsoft Registration Portal". Wrote some server code in my service and managed to get access token for user with next scopes:

• openid
• offline_access
• https://outlook.office.com/Mail.ReadWrite

Next step I tried to do was https://msdn.microsoft.com/en-us/library/dn440163.aspx (yes, I've read Important notice on top of the page, but it is kind of unclear related to my situation).

Made XOAUTH2 authenticate to SMTP server (smtp-mail.outlook.com):

......

OK
send: 'AUTH XOAUTH2 dXNlcj1....9AQE=\r\n'
reply: '535 5.0.0 OAuth failed: OAuth authentication failed due to Invalid token.  Code -2147184118\r\n'
reply: retcode (535); Msg: 5.0.0 OAuth failed: OAuth authentication failed due to Invalid token.  Code -2147184118

Apparently my access token was invalid.

Question is next: should my access token with scopes above, acquired from https://login.microsoftonline.com, give me ability to authenticate in outlook SMTP server at all? Or this feature is already deprecated? ... If not, then how can I get proper access token? Is it possible to get such token for application registered through Microsoft Registration Portal?

Thanks.

Is there an Exchange 2013 server involved in this somehow?  If not, you've posted in the wrong forum.  If you're trying to connect to outlook.com, then I recommend you seek out an outlook.com forum.

thanks for the hint