How to enable the IMAP option in Office 365 email settings?

Follow these steps to enable IMAP option email settings:

1. Sign in to the Office 365 exchange using your email ID, phone, or Skype details to go to your mailbox.
2. Click Recipients > Mailboxes to display the Office 365 User Mailbox.
3. Look for Email apps under the Mailbox tab.
4. Click the Manage email apps settings link.
5. Select the required Display name to view the settings for email apps. The Manage Settings for email apps window will open.
6. Enable IMAP by clicking on the toggle button.

You will not see the message again.
Note: Screens may vary depending on the version of Office 365 you use.