Setting up email accounts in the Outlook desktop app in Office 365 is easy. Head to the File menu in the ribbon in Outlook Type in your email address in the pop-up Outlook box Press the blue. You can configure Microsoft Outlook to access your Office 365 account by setting up an Exchange connection. An Exchange connection provides access your email, calendar, contacts, and tasks in Outlook. You can also set up Outlook to access your email by using IMAP.

1. Microsoft Office 365 Outlook Email

When you try to set up a new mail account for Outlook by using the Add New Account Wizard, your Outlook profile may not automatically set up. Additionally, you may receive the following error message: An encrypted connection to your mail services is not available. This problem will occur for a variety of reasons. This document will go over some solutions to this issue.

Recommended method

Install and run Microsoft Office 365 Support and Recovery Assistant. You can download this tool by following this link: Microsoft Support and Recovery Assistant.

This tool will automatically diagnose any issues with your Office 365 account and provide you with relevant fixes.

Additional methods

Install/upgrade to Office 365: Office 365 - Download/Install Office 365. Important: you may need to uninstall previous version of Office before installing Office 365 version.

Update your Windows operating system (make sure to include other Microsoft software within the update process): Windows - Using Windows Update.

Remove Microsoft account credentials: https://kb.wisc.edu/page.php?id=60885.

1. Open Outlook and click File near the top-left corner.
2. On this page, click Account Settings then click Account Settings from the context menu.
3. This will open a new window, click the Data Files tab near the top.
4. On this tab, select an account and click Open File Location... which will open the file location in File Explorer.
5. Close Outlook, but keep the File Explorer window open.
6. Delete the OST (.ost) file and close File Explorer.
7. Restart Outlook.

First, remove your current profile: Office 365 (Outlook for Windows) - Remove an Outlook Profile. Then, add a new profile: Office 365 (Outlook for Windows) - Configure Outlook.

In some cases, waiting a period of time (30-60 minutes) or continuing to retry configuration may work.

See Also:

Original KB number: 4493666

Symptoms

You can't successfully set up an Office 365 Exchange Online email account in Outlook.

Cause

This issue might occur if your Exchange administrator enables multi-factor authentication (MFA) for your account, but doesn't enable modern authentication for the Exchange tenant organization.

When this issue occurs, the server returns an HTTP 456 authentication error.

Resolution

To fix this issue, disable MFA for the account in the Office 365 admin center. To do this, follow these steps.

Note

You might have to contact your Exchange administrator to disable the MFA .

1. Browse to the Office 365 portal, and sign in to your Office 365 subscription by using your Global Administrator account.
2. On the main portal page, select Admin.
3. In the navigation pane, select Users > Active users.
4. In the Active users pane, select More > Multi-factor authentication setup.
5. Select the check box next to the affected user.
6. Under quick steps, select Disable.

More information

To enable MFA for organizations, Exchange administrators must enable modern authentication in Exchange Online. By default, newer Exchange Online tenants have modern authentication enabled.

You can enable modern authentication for tenants as necessary. Before you enable modern authentication for your Exchange organization, take compatibilities into account. Consider that the user experience will change if MFA is enabled in your organization.

Microsoft Office 365 Outlook Email

For more information, see the following websites: