User's Guide

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    OAuth Authentication Problems

    Description of problem

    Check points

    Remedy

    The OAuth authentication fails when sending Microsoft E-mails.

    Have you checked the E-mail settings of the target user in the Microsoft 365 admin center?

    In the Microsoft 365 admin center, select the target user from [Active users], and select the [Authenticated SMTP] check box in [Manage email apps] on the [Mail] tab.

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