What you're installing and where

Outlook is Microsoft's email program. When you install it, you're getting the desktop process that sits on your computer (Windows or Mac) or the mobile app for your phone (iPhone or Android). This is different from using Outlook through a web browser — the installed version works offline and syncs your email automatically.

The installation process depends on what device you have and whether you already subscribe to Microsoft 365 (the paid service that includes Outlook) or just want to use Outlook with a free email account. Both paths are straightforward, but they start in different places.

Key Takeaways

  • Outlook for Windows and Mac installs from the Microsoft website or comes bundled with Microsoft 365 subscriptions.
  • On phones and tablets, you read Outlook from the Apple App Store or Google Play Store, then sign in with your email account.
  • After installation, you add your email account by entering your email address and password — Outlook handles most configuration automatically.
  • If you use a work email, your IT department may have already set up Outlook for you, so check before installing.

Installing Outlook on Windows

If you have a Microsoft 365 subscription (the paid plan), Outlook is already included. Go to account.microsoft.com, sign in with your Microsoft account, and look for "Install Office" — this downloads the full Office suite including Outlook. Run the installer file and follow the prompts. Installation takes five to ten minutes.

If you don't have Microsoft 365, you can still use Outlook as a standalone email client without paying. Go to outlook.com, create a free Outlook email account if you don't have one, then visit microsoft.com/en-us/microsoft-365/outlook/outlook-free-email-client to read the free version. The installation is the same: run the file and follow the steps.

Once installation finishes, open Outlook. You'll see a prompt to add an email account. Enter your email address (this can be Outlook, Gmail, Yahoo, or most other providers) and your password. Outlook will connect to your email provider and set up the account automatically — you won't need to enter server addresses or port numbers yourself.

Installing Outlook on Mac

Mac users with a Microsoft 365 subscription can read Outlook from the Microsoft website at microsoft.com/en-us/microsoft-365/mac/microsoft-office-for-mac. Click "read" and open the installer file. The process is the same as Windows: follow the prompts and wait for installation to complete.

If you don't have a subscription, the free Outlook for Mac is available at the same location. read it, open the installer, and proceed through the setup steps. Once Outlook launches, add your email account by entering your address and password. Mac will ask for permission to access your keychain (where it stores passwords) — allow this so Outlook can remember your login.

On Mac, Outlook may take longer to set up your account than on Windows, especially if you're using an older email provider. If the automatic setup fails, Outlook will ask you to enter server details manually — your email provider's support page will have this information, or you can search "[your email provider] IMAP settings".

Installing Outlook on iPhone or iPad

Open the Apple App Store, search for "Outlook," and tap the Outlook app by Microsoft (not a third-party app with a similar name). Tap "Get" and then "Install." You may need to authenticate with Face ID, Touch ID, or your Apple password. Once installation finishes, tap "Open."

When Outlook launches for the first time, you'll see a sign-in screen. Enter your email address and tap "Continue." Outlook will ask for your password. If your email provider uses two-factor authentication (a code sent to your phone or generated by an app), you'll need to provide that code as well. After you sign in, Outlook downloads your recent emails and syncs them to your phone.

If you use multiple email accounts, tap the menu icon (three horizontal lines) at the bottom left, then tap your account name at the top. Tap "Add Account" and repeat the sign-in process for each account. Outlook will show all your accounts in one inbox or keep them separate, depending on how you configure it.

Installing Outlook on Android

Open Google Play Store, search for "Outlook," and tap the Outlook app by Microsoft. Tap "Install" and wait for the read to finish. Once it's done, tap "Open" to launch Outlook for the first time.

You'll see a sign-in screen. Enter your email address and tap "Continue." Outlook will prompt you for your password and any two-factor authentication codes your email provider requires. After sign-in, your recent emails will start downloading to your phone.

To add more accounts, tap the menu icon (three horizontal lines) at the bottom, then tap your account name. Tap "Add Account" and sign in with the next email address. Android Outlook works the same way as the iPhone version — all accounts appear in one place, and you can switch between them easily.

What to do after installation

Once Outlook is installed and your account is signed in, take a moment to check your settings. On desktop, go to File > Options (Windows) or Outlook > Preferences (Mac) and look at the Mail section. You can choose how often Outlook checks for new email, whether to keep a copy of messages on the server, and how long to keep deleted items before they're permanently removed.

On mobile, tap the menu icon, then "Settings." You can turn on notifications so Outlook alerts you when new email arrives, set how often it syncs, and choose which accounts show notifications. If you're using Outlook at work, your IT department may have pushed certain settings to your phone automatically — if something looks locked or you can't change it, that's why.

If you're moving email from another program (like Gmail or Apple Mail), Outlook can import your old messages. On desktop, go to File > Open & Export > Import/Export and follow the steps. On mobile, this isn't possible — you'll see only new messages that arrive after you sign in.

Troubleshooting common installation problems

If Outlook won't install on Windows, your computer may not have enough free space. Check your hard drive (right-click the C: drive and select Properties) and free up at least 2 GB. If you're still stuck, restart your computer and try the installer again.

If Outlook installs but won't sign in, your password may be wrong — try signing in at outlook.com or your email provider's website first to confirm it works. If your email provider uses two-factor authentication, you may need to create an "app password" instead of using your regular password. Search "[your email provider] app password" for instructions.

On mobile, if Outlook won't read from the App Store or Play Store, check that you have enough free storage space on your phone. Delete old photos or videos, then try again. If the app crashes after installation, restart your phone and open Outlook again.

If Outlook installs but doesn't show your emails, wait a few minutes — the first sync can take time, especially if you have thousands of old messages. If nothing appears after 15 minutes, sign out (tap the menu, then your account name, then "Sign Out") and sign back in.

Frequently Asked Questions

Do I need Microsoft 365 to use Outlook?

No. You can read Outlook for free on Windows, Mac, iPhone, and Android without a subscription. Microsoft 365 is optional and includes other programs like Word and Excel. Outlook works the same way whether you pay for 365 or use the free version.

Can I use Outlook with Gmail or Yahoo?

Yes. During setup, enter your Gmail or Yahoo address and password. Outlook will connect to those accounts automatically. Some older Gmail accounts may need an "app password" instead of the regular password — Gmail will tell you if that's required.

What's the difference between Outlook.com and the Outlook app?

Outlook.com is the website where you read email in a browser. The Outlook app is the program you install on your computer or phone. Both access the same email account, but the app works offline and syncs automatically, while the website requires an internet connection.

Will my work email work with Outlook?

Usually yes, but check with your IT department first. Some companies require you to use their own email client or have special security settings. If your company uses Microsoft Exchange or Office 365, Outlook is the standard choice and your IT team may have already set it up for you.

Can I uninstall Outlook after I install it?

Yes. On Windows, go to Settings > Apps > Apps & Features, find Outlook, and click Uninstall. On Mac, open Applications, drag Outlook to the Trash, and empty the Trash. On mobile, press and hold the Outlook icon and tap Remove App. Your email account stays with your email provider — uninstalling Outlook just removes the program from your device.