For more information on how to use the Recent activity page, go to What is the recent activity page? Select This was me to let the system know that you authorize the IMAP connectionĪttempt to connect to the account via your IMAP client. Under Recent activity, find the Session Type event that matches the most recent time you received the connection error and click to expand it Go to /activity and sign in using the email address and password of the affected account You may receive a connection error if you configured your account as IMAP in multiple email clients. Verify the Authenticated SMTP setting: unchecked = disabled, checked = enabled.

In the Email apps section, click Manage email apps. Select the user, and in the flyout that appears, click Mail. Open the Microsoft 365 admin center and go to Users > Active users. Any other logins to the desktop version or third party app will ruin the connection.Įnable/disable SMTP AUTH for specific mailboxesĬheck out Microsoft 365 admin center to make sure, SMTP AUTH on specific mailboxes is enabled: Please note: for all Outlook accounts, you must make sure that you are only logged into the web version of the account.

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