Scan to email - Failed SMTP authentication with Office365
https://answers.microsoft.com/en-us/outlook_com/forum/all/scan-to-email-failed-smtp-authentication-with/8b6dcc6a-4eca-4bc5-b812-2f3f7b0c515c
May 13, 2016 · From my personal experience, the error “SMTP authentication failed” indicates that your SMTP client submission wasn’t be set up correctly. Also, regarding your question” what kind of authentication needed”, we need to meet all requirements of SMTP client submission to complete the authentication.
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