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SMTP Authentication

The next important step is to activate authenticated SMTP on your respective mailboxes. If you skip this step, you will face account disconnection issues in Smartlead and Instantly.
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To activate authenticated SMTP, follow these steps:
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Search for "Active Users" in your Microsoft admin dashboard at the top.
Click on "Active Users" to view a list of all the active users in your admin panel.
Click on each user one by one. A small popped-out window will appear on the right side.
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4. Click on the "Mail" option (indicated by the arrow).
5. You will find several options. Go to "Email Apps" and then select "Manage Email App."
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6. In the "Manage Email App" section, you will see various options that are preselected.
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7. Simply select the "Authenticated SMTP" option and click the "Save" button at the bottom.
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That's it! Now you are all set with mailbox configurations.
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