Prerequisites: Office 365 Subscription, Exchange Online Plan
This article explains how you can send email from devices and business applications when all of your mailboxes are in Office 365. For example:
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You have a scanner, and you want to email scanned documents to yourself or someone else.
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You have a line-of-business (LOB) application that manages appointments, and you want to email reminders to clients of their appointment time.
Note
Beginning September 1st, 2018, Office 365 is slowly rolling out changes to SMTP client submission (also known as SMTP Authenticated Submission), which may affect your devices and your applications that send emails. For more information, see the KB article Improvements to the SMTP Authenticated Submission client protocol.
Quelle: docs.microsoft.com