Option 1: Sign In Using a Web Browser
This is the easiest way to access your email and works on any computer without installing software.
Go to Microsoft 365.
Click Sign in.
Enter your Microsoft 365 email address.
If prompted to select an account type, choose Exchange.
Enter your password.
Complete multi-factor authentication (MFA) if prompted.
Access Your Email and Office Apps
Once you're signed in:
Click Outlook to read and send email.
Click Apps to access Word, Excel, and other Office applications.
You can also access your email directly at Outlook on the web.
Tip: If you're having trouble signing in through an Outlook app, try signing in through the web browser first to check whether your account works.
Option 2: Sign In Using Outlook on a Computer
There are several versions of Outlook available. Choose the one you want to use.
Outlook on the Web
No installation required.
Works on any computer with internet access.
Always up to date.
Access it through office.com.
Outlook Classic for Windows
Outlook Classic is the traditional desktop version of Outlook and is recommended in this guide.
Install or reinstall Outlook Classic: Microsoft Support.
Add Your Microsoft 365 Account
Open Outlook Classic.
Click Add Account.
Enter your Microsoft 365 email address.
If prompted to select an account type, choose Exchange.
Enter your password.
Complete MFA verification if prompted.
New Outlook for Windows
New Outlook is a modern version of Outlook that may already be installed on your computer.
Some Microsoft 365 accounts, such as Business Basic accounts, may encounter limitations when setting up the account as the first or primary account in New Outlook.
If you have trouble adding your account, this guide recommends either:
Using Outlook Classic.
Signing in through Outlook on the web.
Option 3: Sign In Using the Outlook Mobile App
The Microsoft Outlook app lets you access email and manage your calendar on your phone.
Install the App
iPhone: Download Microsoft Outlook from the App Store.
Android: Download Microsoft Outlook from Google Play.
Search for Microsoft Outlook in your device's app store.
Add Your Account
Open the Outlook app.
Tap Add Account.
If prompted to select an account type, choose Exchange.
Enter your Microsoft 365 email address.
Enter your password.
Complete MFA verification if prompted.
With the Outlook mobile app, you can send and receive email, manage your calendar, and verify your sign-in when required.
Web Version vs. Outlook App
Feature | Web version | Outlook app |
Installation | Not required | Required |
Access | Works on computers with a browser | Available on desktop or mobile, depending on the version |
Integration | Suitable for quick or temporary access | More integrated for regular use |
Recommended use | Troubleshooting and browser access | Daily email and calendar management |
Troubleshooting Sign-In Issues
If you can't sign in to your Microsoft 365 email:
Open office.com.
Try signing in with your Microsoft 365 email address and password.
Complete MFA verification if prompted.
If web sign-in works but Outlook doesn't, try adding the account again or use Outlook Classic or Outlook on the web.
Summary
You can access your Microsoft 365 email through a web browser, Outlook Classic, New Outlook, or the Outlook mobile app. If you have trouble signing in, test your account through office.com first..