Add your Microsoft 365 email to classic Outlook for Windows

Updated 27 September 2026For Microsoft 365

Add your Microsoft 365 email to classic Outlook for Windows (0:25)

To add your Microsoft 365 work email to classic Outlook for Windows, open Outlook, go to File → Add Account, type your work email address and select Connect. Outlook finds the server settings by itself, so you do not need to type any.

Before you start

Check these first so the setup goes smoothly:

Outlook is installed. Classic Outlook comes with the Microsoft 365 desktop apps. See install the Microsoft 365 apps. Microsoft says the desktop version of Outlook is included in Business Standard and Business Premium, but not in Business Basic.
You have signed in once on the web. If this is a new account, do your first sign-in in a browser and set your own password first.
Which Outlook you have. If the top right of Outlook has a New Outlook switch turned on, you are in new Outlook. See new Outlook or classic Outlook.

Add the account

These steps are for classic Outlook, the one with the Try the new Outlook toggle turned off at the top right.

Open Outlook. If it is the first time, Outlook may ask you to name a new profile; type any name, such as Outlook, and select OK. It then asks for your email address straight away; skip to step 3.
Otherwise select File → Add Account.
Type your work email address, for example aina@yourcompany.com, and select Connect. If you are already signed in to Office, the address may be filled in for you.
A Microsoft sign-in window opens. Type your password and select Sign in, then type the code from your Authenticator app if asked.
Windows may ask Sign in to all apps and websites on this device? For a company laptop, your admin will tell you what to choose. On a personal or shared computer, choose No, this app only.
When you see Account successfully added, untick Set up Outlook Mobile on my phone, too unless you want that, and select Done.

Outlook downloads your email, calendar and contacts. A large mailbox can take a while the first time, so leave Outlook open. Your work account then appears in the folder list on the left.

Classic Outlook with the work account in the folder list highlighted

Remove an account

If you need to take the account off a shared or old computer, go to File → Account Settings → Account Settings, select the account and choose Remove. This removes the email from this computer only; nothing is deleted from your mailbox.

Account Settings window with the work account and the Remove button highlighted

If it is the only account in Outlook, Outlook will not let you remove it from there. Close Outlook, open Control Panel, search for Mail and open Mail (Microsoft Outlook). Select Show Profiles, choose the profile, select Remove and confirm with Yes.

Mail window listing the Outlook profile with the profile list and the Remove button highlighted

Shared mailboxes

If your admin gave you access to a shared mailbox such as sales@, it usually appears under your own mailbox after you restart Outlook. See open a shared mailbox.

Still stuck

WhatsApp our support team at +60 16-916 3324.

Common issues

Outlook asks for server names and ports. What do I type?

You should not need any. Microsoft 365 accounts set themselves up from your email address. If Outlook asks for IMAP or POP settings, go back and check you typed your work address correctly, then ask your admin to check that your domain's autodiscover record is in place. See connect your domain.

I have Business Basic. Why can't I install Outlook for Windows?

Microsoft's Business Basic plan includes Outlook on the web and the Outlook phone app, but not the desktop version of Outlook. Use Outlook on the web or ask Office Niaga about a plan with the desktop apps.

Outlook keeps asking for my password.

Close Outlook, open it again and sign in when the Microsoft sign-in window appears, including the Authenticator step if your company uses one. If it keeps asking, your password may have changed or expired; see forgot your password.

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